I earlier reported an issue because i couldnt launch arma 3 but now i can launch it and play multiplayer for a while (< 5minutes) then it crashes. my friend said that when i crashed the server said: "steam ticket check failed". i deleted "PhysX3_x86.dll" file and verified steam arma 3 files it didnt do nothing.

some backround:
http://feedback.arma3.com/view.php?id=18875

PC specs:
i5 3570k 3.4ghz
asrock z77 extreme 4
gtx 660 msi
corsair vengeance lp 2x4gb
corsair cx500m psu