CSS:S Help

[Supercow]

So i tried to join a mate in a gun game tonight, and everytime i try connect, I get the following error "
Disconnect: Error verifying STEAM UserID Ticket."
Why is this, this is a fresh install of the game?

 

[Supercow]

cheers, ill have a look

 

[Supercow]

Hmm still not doing anything, and i tried all of the above.
I dont get the same error anymore, but the connect just hangs on "sending client info"