Problems with Vista and Media Center

I had a sweet setup sharing media center between my xbox and my XP MEC
laptop. I was successfully sharing all media files between the two
systems through my wireless router and recently began streaming XM
radio through Media Center to my xbox and all was well with the world.
That is until I upgraded my OS to Vista. Initially it seemed that the
transition was seamless until I tried to connect to the XM radio. I was
able to connect to the XM webpage but when I tried to play a song I
would receive an "audio error". All other files can be shared as they
were before so the only problem is in connecting to the XM site. Any
advice for me would be greatly appreciated.


--
sdunn