Hello! I have two Win 7 computers on a wired network. This has also been tried on wireless as well. One computer is logged into a speech therapy site. Audio and video work just fine. The minute I log the second computer into the speech therapy site, the first computer's Mic becomes so amplified you can hear all background noise very clearly and super loud. The second computer's Mic has no sound. Puzzled. Can anyone guide me to some possibilities?