MSN Messenger & Media Center 2005

Are there any known issues with sound problems while using MSN Messenger &
Media Center? I did not have any problems using MSN messenger prior to me
changing my computer system. I recently purchased an HP M7060N which has
Media Center 2005 version of XP.

I have uprgraded to the latest version of MSN 7.0.0813. The problem I'm
having is that I can only communicate both Audio/Video for approximately 30
seconds to a minute. I then must switch to audio only.

The microphone settings max out and contacted party hears nothing but
feedback. Any help, suggestions would be appreciated. also the contacted
party can use their software with others and no problems... so the problem is
on my end....

Thanks