PBEM game won't load after Blue Marble install

[HitAnyKey]

I installed the Blue Marble thing yesterday and now the PBEM game that I have going with my brother won't load. It gives me a message about the save being protected and then the game exits.
I even ran the Uninstall of Blue Marble and tried again and it still didn't work.
What is wrong and how do I fix it? Do I need to totally reinstalled Civ4? And if so, how do I fix things so that I can use the Blue Marble in single player games, but use the normal settings for the PBEM games.

Please help as I would like to get my turn back to him tonight.

Thanks!

[HitAnyKey]

Problem solved...

All is solved now. It wasn't the BMT itself that caused my problem. It was that I had used the scaling tool to change the size of the city display. Just need to restore the defaults before loading the PBEM game.