Crash - Loading Coop

What is your in-game Screen Resolution? 1680x1050
What is your Texture settings set at? high
Operating System: Win7 prem 64bit
Processor: intel dual core 3,0GB
Memory: 4 GB
Graphic Card: 512 mb
Graphic Card Driver Version: lastest
BF2 1.4.1 Patch installed: Yes
BF2 1.5 Patch installed: I'm on it
NAW 6.0 Map Pack 1 installed: Yes
NAW 6.0 Map Pack 2 installed: Yes
NAW 6.0 Map Pack 3 installed: Yes
NAW 6.0 Map Pack 4 installed: Yes
Are you able to play regular BF2 ok? Yes
While running NAW 6.0 in Window Mode....did you get a error message? No (just crash^^)
Did you re-install everything correctly again?: Yes
Did you re-install your graphic drivers correctly again?: Yes

The Game crashes after loading (the time when the "ready"-Button should appear and in some levels it crashes after In join the level. Ive never got problems with N@W-Mod bust just in Multiplayer coop. Singleplayer works well and my first (and the only one) try in MP conquest works also. Same map as in conquest didnt work in MP-Coop. But in Conquest mode it crashes after entering a Helicopter.
Maybe that helps.

thx in advance.

EDIT: Now it doesnt even work with multiplayer. I Downloaded the client, used Mappack 1 - played; used Mappack 2 - played; used Mappack 3 - played; used Mappack 4 - doesn't work.
So I dindt have any issues without the Mappack 4.
Any Way to get this fixed 4me?