CoH: Modern Combat

We both installed it in the relaunch, no we hadn't played any previous of the mod and my friend completely uninstalled the game and deleted all mods and started fresh. It's done this to us in other mods AND in vanilla but it would only happen like once and I'd just reset my game and then it would ...

We both tried and all our files checked out, still doesn't let us join each others games.

Another of my friends has tried to run the installer and gets an error message right off the bat that says: "cannot access network location" bla bla bla. He has Vista if that means anything.

Me and a friend both have the mod installed and working in SP skirmishes, but can't connect to one another's game. We just get an immediate error message like it doesn't try to load, we have the same version and everything. Help?