Server crashes when i go through portal

[ComerRJ]

My friend plays on this server and i wanted to play with him. It lets me join the server and walk around spawn but when i try to go through a portal to warp to PVE it crashes. this is what it says

 

[b#439]  2014-04-26 20:52:28 [iNFO] [sTDOUT] #@!@# Game crashed! Crash report saved to: #@!@# C:UsersuserAppDataRoaming.technicmodpacksattack-of-the-bteamcrash-reportscrash-2014-04-26_20.52.28-client.txt

[b#439]  AL lib: (EE) alc_cleanup: 1 device not closed

 

 Please Help!

Edited April 27, 2014 by ComerRJ