Question about emailing games

My brother and I like to play as one civ and email the game back and forth after about 10 turns. We did this all the time with civ3, but something is not working right for cIV. When I send him a saved file, he puts it in the My Games/Civ 4/Saves/Single folder, but the game will not recognize the file to load it. When he sends me a saved game, my computer sees it and loads it fine. Any idea what the problem could be? We are both using the latest version of cIV as far as i can tell.

Thanks for any help in advance!

 

make sure you both have the same game version and that you both have no mods (or custom units) in the game.

It doesn't matter about game settings but if you or he has a unit or modded game file this causes problems basic civ4/WL/BTS (patched) will load and run a saved game from any pc. also clearing the game cashe may also help

 

How do I clear the game cache?

My brother reinstalled the game with the 1.74 update (which is what I am using), but it still doesn't work. I don't know if this matters, but my computer uses a ".Civ4SavedGame" file extention for the saved files, but his computer uses a ".SavedGame" file extention.