Force disconnect of players

[mrhuggalumps]

Hoping this is the correct place. Created a modpack which works like a dream on single player, however when testing it on the server, when I try to access the tent GUI from the camping mod,  I get a "fatal error has occurred, this connection is terminated" A crash log isn't generated server or client side.

here is the latest FML server log: http://pastebin.com/0Rj6x64K

latest client FML log: https://paste.ee/p/1ydti

Not too sure whats going on, but there is something about the camping mod in the client log (its near the bottom) around the time the force disconnect occurs