Camstudio freezes frequently when recording art on tablet

I've been trying to record art tutorials and for some reason, I start the recording and switch to Photoshop to do some tablet drawing, but it freezes at random points. To be specific, the pen stops working though the recording and everything else works fine. So I guess it would be more accurate to say the pen is the only thing that freezes. But if I stop the video, the pen works again perfectly. There appears to be no pattern as to when the pen stops, but it's usually within the first few seconds if at all. I usually have to try over and over until it finally decides to work the whole way through.

Has anyone else run into this kind of issue before?

Camstudio version is 2.7 r316
Photoshop is CS 5.5
Tablet is Bamboo Pen
Graphics: Nvidia (newest version available as of July)
Windows 7
8 GB Ram