Video Calls Crash WLM

I need some assistance in resolving a problem with using Video Call on WLM.
Whenever I end a Video Call that I initiated or when a Video Call is
initiated to me WLM freezes and becomes unresponsive. Then only way to
recover is killing it in Task Manager. This was with a Logictec Notebook Pro
webcam. I have already updated the drivers/software for the webcam and I am
running the lastest version of WLM. So in my attempts to resolve this problem
I have been now using a Micrsoft LifeCam VX-6000 to see if this worked any
better. It doesn't. Now WLM just crashes hard whenever I end my Video Calls.
Have not tested Video Calls initiated to me yet. Any suggestions or ideas
would be appreciated in trying to resolve this problem. On another note on a
few rare occasions I have found that after a freeze/crash and restarting WLM
my Video Call invitaion is not received or WLM says the other person is not
amswering. What I have to do then is just send a webcam only invitation and
then initiate a voice call. With the Logictec webcam the freeze/crashes occur
about 75% of the time, with the LifeCam it has been 100% of the time.

Thank you!