It worked! Thanks Xander and all :) very quick response.

Thanks for the response, we should be able to try it this evening.

I bought Multiwinia through the online store, my friend bought it through Steam. We can see each other in the server browser, but are listed as INCOMPATIBLE to each other and can't connect. My version is reported as retail.iv.1.1.0, his is steambeta.1.9.35 I can see other people that I can connect t...