i have problem about lost connection. What can I do?

I try installing new plugin already but it doesn't help. I tried everyway possible to fix it but can't. Who know how to fix it please help me.

 

What is your server.properties?

 

#Minecraft server properties
#Wed Nov 21 18:10:26 ICT 2012
generator-settings=
allow-nether=true
level-name=world
enable-query=false
allow-flight=false
server-port=8521
level-type=DEFAULT
enable-rcon=false
level-seed=
server-ip=
max-build-height=256
spawn-npcs=false
white-list=false
spawn-animals=true
snooper-enabled=true
hardcore=false
texture-pack=
online-mode=true
pvp=true
difficulty=1
server-name=Unknown Server
gamemode=0
max-players=100
spawn-monsters=true
generate-structures=true
view-distance=4
spawn-protection=16
motd=1.4.5 Minecraft

 

please help me

 

Nevermind did not look at screenshot

 

He mustn't do that. When no IP is given in the server.properties then the server uses the 192.168.x.x-IP... But sofano hasn't this: he has the 122.155.190.210:502xx!
sofano why you have this IPs?! ^^

 

Nevermind did not look at screenshot

 

Uh, no. If you have multiple IP's, sure, but not on just a regular desktop.

 

No you must:

Code:

server-ip=

(No fake )
Then my server starts with the IP 192.168.2.103

 

If you say so.

Nevermind did not look at screenshot

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

On my dedi, I put the IP in 'server-ip' for my other servers so that it uses that IP and not the root one. If you are running it off of your desktop computer, you are probably just trying to get a friends server up off of a not very powerful machine, meaning it will only be using one IP, the root one.

 

i tried it already is there any other way?

thank you