Keep Crashing in Large Multiplayer Sieges

[Phantom Lamb]

I am having a problem.  Every time I join a siege match with more than like 50 people, I am usually able to select my class and everything but right after that the game crashes and says something has gone wrong.  I already did the disable flag thing and changed some of the graphic options and still don't know why this keeps happening.  At times, I can participate in the match for maybe 3 minutes or so then it still crashes.  Any help would be appreciated!

Thanks

 

[SLAVtheTERRIBLE]

Running client 1.53, right? Ensure.