i formated and i reinstalled it and everythin, and then installed the patch, and now whenever i try to connect to any server it gives me this error, the one u c in the screen shot:

I have no idea, DX. I've got the lag issue NO one can explain, but maybe this problem of yours is explainable. Try posting on http://forums.tactical-ops.de/index.php? and see if they know how to fix it. I imagine they will, because those type of errors they understand. Hopefully you can get the help you need. Good luck, man.

o don't worry about it guys, i figured it out myself! i was gettin this error cuz after i installed the game, i forgot to install the 3.4 patch, so i was gettin this shit cuz i installed the 3.5 patch without installin the 3.4 patch.