Crash to desktop during Multiplayer games

[typhoonsg1 0]

Hi i bought ArmA from local game shop a few days ago but when i try to play it it randomly crashes to desktop, before anyone starts sayingthis is a fully legit version

heres my specs

Pentium D 2.8 GHZ

1GB DDR RAM

Nvidia Geforce 7600 GS 256MB

It runs perfectly when not CTD'ing any ideas

and by the way dont ninja this thread

[Sc@tterbrain 0]

Try these two threads for more info.

Sprocket CTD thread

CTD thread