please help!

[Dogboy]

Enjoying the holidays, reliving geek life with my brother.

I am sorry for posting a Dominions 4 question here, but there does not seem to be a Dom 4 forum, and there does not seem to be a good place to go for advice.

I bought 2 copies of Dom 4, on Steam, one for myself and one for my brother. I set up the server fine, and he can join, from his steam account. But, when I try to join as client, steam won't let me start the game a second time.

Any help would be greatly appreciated.