"Failed to join - the game is a different version."
This is the error message I get when I am trying to join a 'custom match' of C&C zero hour/generals.
I have the 'decade' disk, FWIW. I also occasionally have problems being 'unable to connect' to people using quick match.
Do I need to buy or download something else. I'd love to set up custom matches, or at least join them.