"version mismatch - critical game files do not match host's"

[diablosoon]

I recently started up Sid Meier's Civilization IV: Colonization to play with my brother over lan connection. I was really frustrated with the error "version mismatch - critical game files do not match host's" appearing for me, and for him as well when I tried hosting. I have no mods to colonization itself installed and neither does my brother.

We both use build version 1.0.0.1, colonization version 101, and save version 2 .I launch it off of steam and we've tried launching it off of the .exe as well. We're very confused and would really like some assistance on the matter. Please help me!

 

[Standish]

I can not offer any help as I have had a similar problem, but, can you still play even though it says that?