Online with Vista

[Cole]

I'm on my way to the Matrix forums but while I'm digging around over there wonder if anyone has seen the following problem when trying to play CS online.

I attempted both host and caller.
I have Windows XP, my friend Vista.
No luck when I was the Modem Host via TCP/IP. Tried with Anti-Virus program both on and off.

A little better luck when I was Modem Caller. I could see the WF Session but when I tried to join I got the unknown to me until recently "Join error".
My friend turned off the Vista firewall.

Any thoughts would be appreciated.