Mods don't work

[upain]

I've tried downloading a bunch of mods and playing them but they don't work. I can do everything right up to playing them. After downloading and installing using steam I open it and the game loads. But as soon as I try to start the game, the game ends. The victory screen just comes up and I can't even click the "wait...just...one...more...turn" button. I have to click the return to main menu button. I already deleted it and tried to reinstall it but I still have the same problem with all the mods and scenarios. What should I do to solve this problem?