what do you mean by "Kicking you out"?
While I'm not certain to the cause of the crash since an in depth description for any such support is necessary to diagnose properly, I'm confident it had little to do with Ewiger Krieg.
Now I'm not saying that a mod can't cause the game to crash, it quite readily can (or even make it not start at all), however Ewiger Krieg has had a pretty clean history of game stability up till now predominantly because it doesn't actually alter game resources or actual functionality, but rather just "changes the rules" so to speak so that you can use things you're not supposed to be able to normally.
I'm more than willing to hear you out, don't presume that I won't listen and try to replicate the conditions myself to see if it's a repeatable issue, however until I know exactly what you were doing, how, and with what programs I can't even draw out an idea of what is wrong much less how to fix it.
Background programs, security software in particular, are notorious for function and crash issues. If you're using Vista, the UAC is another culprit which many have had to contend with... I just disable mine, good security software should do it's job and never even be noticed.