I have problem with my bukkit server it is lagg.

I have try to change ram for the server and try to deleted plugins but I get lagg my consol say​

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D:\minecraft\deepholmsbuildcraft>java -Xmx1024M -Xms1024M -jar craftbukkit.jar nogui.
174 recipes
27 achievements
17:38:04 [INFO] Starting minecraft server version 1.1
17:38:04 [INFO] Loading properties
17:38:04 [INFO] Starting Minecraft server on 192.168.0.192:25565
17:38:04 [INFO] This server is running CraftBukkit version git-Bukkit-1.1-R4-b1938jnks (MC: 1.1) (Implementing API version 1.1-R4)
17:38:06 [INFO] [Register] Preferred method [null] not found, using first found.
17:38:06 [INFO] [Register] version 1.5 is enabled.
17:38:06 [INFO] [Pail] Loading Pail v0.7.5.
17:38:06 [INFO] [Pail] Initializing...
17:38:06 [INFO] [Pail] Setting up themes...
17:38:06 [INFO] [Pail] Registering events...
17:38:06 [INFO] [Pail] Loading interface...
17:38:26 [INFO] [Pail] Setting up window...
17:38:26 [INFO] [Pail] Pail 0.7.5 Enabled
17:38:26 [INFO] Preparing level "World"
17:38:26 [INFO] Default game type: 0
17:38:26 [INFO] Preparing start region for level 0 (Seed: 2080068952293110096)
17:38:27 [INFO] Preparing start region for level 1 (Seed: 2080068952293110096)
17:38:28 [INFO] Preparing spawn area: 77%
17:38:28 [INFO] Preparing start region for level 2 (Seed: 2080068952293110096)
17:38:28 [INFO] [ZeeSlag] Loading ZeeSlag v1.1.
17:38:28 [INFO] ZeeSlag: Initializing Settings, Randomizer and HashMaps...
17:38:28 [INFO] ZeeSlag: Permission system not detected, defaulting to OP.
17:38:28 [INFO] ZeeSlag: iConomy not found! Check the bukkit forums for which iConomy you can use!
17:38:28 [INFO] ZeeSlag: Enabled v1.1 by Jucko13. (Done in 128 ms)!
17:38:28 [INFO] [Tetris] Loading Tetris v0.5.
17:38:28 [INFO] Tetris version 0.5 is enabled!
17:38:28 [INFO] [RAM] Loading RAM v1.0.
17:38:28 [INFO] [RAM] Version 1.0 enabled!
17:38:28 [INFO] [NeoMeteors] Loading NeoMeteors v0.0.1.
17:38:28 [INFO] Permission system not detected, defaulting to OP
17:38:28 [INFO] [NeoMeteors] Enabled!
17:38:28 [INFO] [WorldEdit] Loading WorldEdit v5.0.
17:38:28 [INFO] WorldEdit 5.0 enabled.
17:38:28 [INFO] WEPIF: Using the Bukkit Permissions API.
17:38:28 [INFO] WEPIF: Using the Bukkit Permissions API.
17:38:28 [INFO] [Towny] Loading Towny v0.79.0.0.
17:38:28 [INFO] ==================== Towny ========================
17:38:29 [INFO] [Towny] Database: [Load] flatfile [Save] flatfile
17:38:30 [INFO] [Towny] Using: BukkitPermissions, Questioner v0.5
17:38:30 [INFO] [Towny] Time until a New Day: 18 hours, 21 minutes, 30 seconds
17:38:30 [INFO] =============================================================
17:38:30 [INFO] [Towny] Version: 0.79.0.0 - Mod Enabled
17:38:30 [INFO] =============================================================
17:38:30 [INFO] [iConomy] Loading iConomy v6.0.8b.
17:38:30 [INFO] [iConomy - Celty] Enabled (125 ms)
17:38:31 [INFO] [SmokeMachine] Loading SmokeMachine v1.1.
17:38:31 [INFO] [SmokeMachine] Version 1.1 enabled!
17:38:31 [INFO] [simpleWeather] Loading simpleWeather v0.1.
17:38:31 [INFO] SimpleWeather has been enabled.
17:38:31 [INFO] [BomberCraft] Loading BomberCraft v0.7.
17:38:31 [INFO] BomberCraft version 0.7 is enabled!
17:38:31 [INFO] [MeteorShower] Loading MeteorShower v1.0.1.
17:38:31 [INFO] [MeteorShower] version 1.0.1 has been enabled!
17:38:31 [INFO] [BOSEconomy] Loading BOSEconomy v0.7.2.
17:38:31 [INFO] BOSEconomy: Could not locate the Permissions plugin. Option 'use-permissions-plugin' will be ignored.
17:38:31 [INFO] BOSEconomy v0.7.2 enabled.
17:38:31 [INFO] [AdminCmd] Loading AdminCmd v5.11.1 (BUILD 22.01.2012 @ 11:45:48).
17:38:31 [INFO] [AdminCmd] Plugin Enabled. (version 5.11.1 (BUILD 22.01.2012 @ 11:45:48))
17:38:31 [INFO] [AdminCmd] 92 extra help entries loaded from files: AdminCmd(92)
17:38:31 [INFO] [AdminCmd] bal_extinguish has all his alias already registered. Command deactivated
17:38:31 [INFO] [AdminCmd] bal_list has all his alias already registered. Command deactivated
17:38:32 [INFO] [AdminCmd] Disabled Alias(es) for bal_thor : t,
17:38:32 [INFO] [AdminCmd] Disabled Alias(es) for bal_undo : undo,
17:38:32 [INFO] [AdminCmd] Disabled Alias(es) for bal_sp : sp,
17:38:32 [INFO] [AdminCmd] Disabled Alias(es) for bal_uptime : up,
17:38:32 [INFO] [AdminCmd] motd.txt loaded
17:38:32 [INFO] [AdminCmd] motdNewUser.txt loaded
17:38:32 [INFO] [AdminCmd] news.txt loaded
17:38:32 [INFO] [AdminCmd] rules.txt loaded
17:38:32 [INFO] [AdminCmd] 0 blacklisted items loaded.
17:38:32 [INFO] [AdminCmd] 0 blacklisted blocks loaded.
17:38:32 [INFO] [AdminCmd] 2281 alias loaded.
17:38:32 [INFO] [AdminCmd] 2 kits loaded.
17:38:32 [INFO] [AdminCmd] 0 banned players loaded.
17:38:32 [INFO] [Lockette] Loading Lockette v1.4.9 beta.
17:38:32 [INFO] [Lockette] Version 1.4.9 beta is being enabled! Yay! (Core version 1.3)
17:38:32 [INFO] [Lockette] Detected craftbukkit build [1938] ok.
17:38:32 [INFO] [Lockette] Enabled link to plugin Towny for Groups/Zones, version 0.79.0.0
17:38:32 [INFO] [Lockette] Using ops file for admin permissions.
17:38:32 [INFO] [Lockette] Ready to protect your containers.
17:38:32 [INFO] [Volcano] Loading Volcano v0.89.
17:38:32 [INFO] [Volcano] Volcano 0.89 is enabled!
17:38:32 [INFO] [Tables] Loading Tables v0.5.
17:38:32 [INFO] [Tables 0.5] Enabled
17:38:32 [INFO] [Questioner] Loading Questioner v0.5.
17:38:32 [INFO] [Questioner] v0.5 - Enabled
17:38:32 [INFO] [Jobs] Loading Jobs v2.6.1.
17:38:33 [INFO] [Jobs] - max-jobs property not found. Defaulting to unlimited!
17:38:33 [INFO] [Jobs v2.6.1] has been enabled succesfully.
17:38:33 [INFO] [Jobs] Successfully linked with iConomy 6.
17:38:33 [INFO] [TownyChat] Loading TownyChat v0.16.
17:38:33 [INFO] [Register] Loading Register v1.5.
17:38:33 [INFO] [Register] Payment method found (BOSEconomy version: 0.7.0)
17:38:33 [INFO] [Lockette] Enabled link to plugin Register for Economy, version 1.5
17:38:33 [INFO] [ChestShop] Loading ChestShop v3.29.
17:38:33 [INFO] [ChestShop] Lockette version 1.4.9 beta loaded.
17:38:33 [INFO] [ChestShop] Towny version 0.79.0.0 loaded.
17:38:33 [INFO] [ChestShop] version 3.29 initialized!
17:38:33 [INFO] [ChestShop] BOSEconomy 0.7.0 loaded.
17:38:33 [INFO] Server permissions file permissions.yml is empty, ignoring it
17:38:33 [INFO] Done (7.104s)! For help, type "help" or "?"
17:38:57 [INFO] Starting GS4 status listener
17:38:57 [INFO] Query running on 192.168.0.192:25565
17:38:57 [INFO] /192.168.0.192:57580 lost connection
17:38:57 [INFO] /192.168.0.192:57594 lost connection
17:38:57 [INFO] -******* TownyChat enabled *******-
17:39:06 [SEVERE] java.lang.NullPointerException
17:39:06 [SEVERE] at net.minecraft.server.NetworkListenThread.a(NetworkListenThread.java:34)
17:39:06 [SEVERE] at net.minecraft.server.NetLoginHandler.a(NetLoginHandler.java:154)
17:39:06 [SEVERE] at net.minecraft.server.Packet254GetInfo.handle(SourceFile:16)
17:39:06 [SEVERE] at net.minecraft.server.NetworkManager.b(NetworkManager.java:226)
17:39:06 [SEVERE] at net.minecraft.server.NetLoginHandler.a(NetLoginHandler.java:47)
17:39:06 [SEVERE] at net.minecraft.server.NetworkListenThread.a(NetworkListenThread.java:61)
17:39:06 [SEVERE] at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:537)
17:39:06 [SEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:435)
17:39:06 [SEVERE] at net.minecraft.server.ThreadServerApplication.run(SourceFile:465)
17:39:06 [INFO] /192.168.0.192:57608 lost connection
17:39:18 [INFO] modder97 [/192.168.0.192:57626] logged in with entity id 292 at ([World] 72.65625, 71.0, 490.6875)
17:39:21 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
17:39:30 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
17:39:46 [INFO] [Volcano] modder97:
17:39:52 [INFO] [Volcano] modder97: create
17:39:57 [INFO] [Volcano] modder97: help
17:41:07 [INFO] [Volcano] modder97: create volcano 10 95 stone 5 lava
17:41:36 [INFO] [Volcano] modder97: create volcano 10 100 stone
17:41:48 [INFO] [Volcano] modder97: start volcano
17:41:48 [INFO] [Volcano] save volcano
17:42:02 [INFO] 24, 45
17:43:44 [INFO] modder97: Setting modder97 to game mode 0
17:44:33 [INFO] modder97: Setting modder97 to game mode 1
17:52:37 [INFO] [g] [World] Apprentice Miner modder97: snow
17:55:07 [INFO] [Volcano] modder97: crater volcano 10
17:55:07 [INFO] [Volcano] save volcano
17:55:52 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
17:56:04 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
17:56:06 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
17:56:08 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
17:56:29 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
17:56:56 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
17:57:00 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
17:57:23 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
17:57:27 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
17:57:31 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
17:57:38 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
17:57:47 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
17:57:53 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
17:58:01 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
17:58:50 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
17:59:51 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
17:59:58 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
18:00:07 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
18:00:25 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
18:00:43 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
18:00:48 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
18:00:58 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
18:01:09 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
18:01:19 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
18:02:34 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
18:02:45 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
18:02:51 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
18:02:54 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
18:03:04 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
18:03:07 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
18:03:50 [WARNING] Can't keep up! Did the system time change, or is the server overloaded?
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