I can't make any sense of this of this crash, any ideas?

[armyof12monkeyss 10]

So whenever I try to go into my clans server the game crashes, but not on other servers. I load in, see the list of names, click ok, reciving mission file loads and then I crash to destop. Message says "Arma 2 oa has stopped working".

Faulting application name: arma2oa.exe, version: 1.62.99.153, time stamp: 0x50a65807

Faulting module name: arma2oa.exe, version: 1.62.99.153, time stamp: 0x50a65807

Exception code: 0xc0000005

Fault offset: 0x0012fab6

Faulting process id: 0x160

Faulting application start time: 0x01cdd032f2041e56

Faulting application path: C:\Program Files (x86)\Steam\steamapps\common\Arma 2 Operation Arrowhead\Expansion\beta\arma2oa.exe

Faulting module path: C:\Program Files (x86)\Steam\steamapps\common\Arma 2 Operation Arrowhead\Expansion\beta\arma2oa.exe

Report Id: 3e66a773-3c26-11e2-95c0-f46d04ed62cf

anyone have any idea?

[Corac 9]

verify files in steam. should fix it

[armyof12monkeyss 10]

didnt work.