I have had a problem with permissions lately, the prefixes would not show up, I was using groupmanager, so I switched to PermissionsEx, ran a little test server of my own, it worked fine all of my ranks were perfect. So I put it on my real server, and still no prefixes, which forced me to believe it is a plugin problem. Here are my plugins: Backup, BookWorm, ChatManager, ChestShop, ColoredSigns, CoreProtect, CreeperHeal, Essentials, EssentialsGroupBridge, EssentialsProtect, EssentialsSpawn, FalseBookBlock, FalseBookCart, FalseBookCore, FalseBookExtra, FalseBookIC, Herochat, iConomy, Jobs, LWC, mcMMO, MobDisguise, Modifyworld, Multiverse-Core, Multiverse-Inventories, Multiverse-Portals, NoCheat, OpenInv, PermissionsEx, Residence, SinpleRestart, Sleep,Vault, Votifier, VoxelAir, VoxelDoop, VoxelMimic, VoxelPort, VoxelSniper, VoxelUpdate, WorldEdit, Worldguard. Sorry for my amount of plugins. lol.