So you've been using XM radio online, and all the sudden its broken? Try this fix:

From a command line [as admin in win7]:
cd\windows\system32
regsvr32 wmnetmgr.dll

Thats it.

http://support.microsoft.com/kb/957204/en-us
http://www.eggheadcafe.com/tutorials/aspnet/187cb72b-8da5-4dd9-b061-52e6d6304bee/c00d11bb--resolve-protoc.aspx