Sound Problems Windows messenger Live

I installed parallels last week on MacBook Pro and iMac bothe with dual core 2, latest build of Parallels.

When I use Mesenger Live to make computer to computer call, the party I called can hear me, but I cannot hear them. Its odd that I can sometimes communicate for a few seconds two way OK, then I can no longer hear them but they can still hear me.

I have confirmed sound setting as defaults.

I stop hearing system sounds also after Messenger problem. If I restart system sounds are OK, but once I try Messenger again the sound problems begin until I rebbot.

Iseas?

TIA,
Bikk