Java.lang.ArrayIndex error?

Hi guys, i have an URGENT issues, my 18 slot server keeps crashing every 2-3 minutes.

Build #: RB1000
Host: GSVerse (BeastNode)
Plugins: FLT Detector, Essentials, Ess. Spawn & protect, WorldGuard, WorldEdit, StealthLogin, LWC, Permissions (last one before 3) and a few more i can't remember.

Well it happens when ever my players use the '/spawn, /warp, /home and /tp' commands

Extracts from my log file: http://pastebin.com/PmA9qiQd

(The logs here are about 1 hour old because my internet won't load GSVerse's CP)


Thanks for all your help


-Fish