Version doesnt match the hosts?

[WillCooper]

Hey, I have CIV 4 with the BTS expansion pack with version 3.19 (Latest). Every single multiple game I try says the version doesnt match the hosts. And I constantly go out of sync. What is going on here?

 

[ori]

did you modfy the game in any way? could you post a screenshot of the about this build screen?