I've debugged CoD2 without microphone (so it's crashing) and the result was:

Click image for larger version.  Name: avrt.jpg  Views: 27  Size: 334.0 KB  ID: 429


Click image for larger version.  Name: info.jpg  Views: 25  Size: 19.7 KB  ID: 430

I guess this file is causing the problems, can you upload the Windows XP version of avrt.dll? The problem with debugging this is that IDA Pro is freezing/crashing also (lol).