Arma 2 Crashed - Need Help

[tarabas 10]

On fresh Win764 Installation. i2500k@4.5 ATI 7950 3GB 8GBRAM, creative X-Fi Gamers , up to date drivers.

Playing 1 hour, then:

ID des fehlerhaften Prozesses: 0x998
Startzeit der fehlerhaften Anwendung: 0x01ce2d79eae3b9f8
Pfad der fehlerhaften Anwendung: C:\Program Files (x86)\Desura\Common\ARMA 2 Operation Arrowhead\Expansion\beta\arma2oa.exe
Pfad des fehlerhaften Moduls: C:\Program Files (x86)\Desura\Common\ARMA 2 Operation Arrowhead\Expansion\beta\arma2oa.exe
Berichtskennung: e354df9c-9977-11e2-8525-005056c00008

- System 

 - Provider 

  [ Name]  Application Error 

 - EventID 1000 

  [ Qualifiers]  0 

  Level 2 

  Task 100 

  Keywords 0x80000000000000 

 - TimeCreated 

  [ SystemTime]  2013-03-30T20:24:57.000000000Z 

  EventRecordID 3126 

  Channel Application 

  Computer Garack-PC 

  Security 


- EventData 

  arma2oa.exe 
  1.62.102.591 
  512e1989 
  arma2oa.exe 
  1.62.102.591 
  512e1989 
  c0000005 
  0066f0e6 
  998 
  01ce2d79eae3b9f8 
  C:\Program Files (x86)\Desura\Common\ARMA 2 Operation Arrowhead\Expansion\beta\arma2oa.exe 
  C:\Program Files (x86)\Desura\Common\ARMA 2 Operation Arrowhead\Expansion\beta\arma2oa.exe 
  e354df9c-9977-11e2-8525-005056c00008 

Any Help? Playing with latest Beta Patch.