No Server Browsing in Half Life / CS / Return to Wolfenstein

[Dr. Doug]

For some reason TCP/IP apps (Ultima Online, mIRC, etc.) work fine, but
when I go to browse servers for Internet Games in Half Life /
Counterstrike / etc.. can't get a server list, no error, just 0 servers.
No, there are no filters on or anything and I hit update and refresh and
still a no go; Yes, Everything works fine in Windows.  Any help would be
greatly appreciated.

Douglas Thigpen