That worked! .When you start the game the desktop resolution is changing to the lower res ,but a sec after that it's returning to the resolution that you choosed in the game menu.Thanks for the help!

About the drivers , I installed new version of AMD catalyst few weeks ago.Now I'm reinstalling steam because I had problems with other games of the bundle too.(I know the SMB problem wasn't in steam ,but still have to try ...)

I have the same problem. I bought the game with Humble Bundle (I bought the bundle mainly for SMB).Downloaded and installed it ,but when i try to start it ,it gives me :

Code:

Runtime error!
This aplication has requested the Runtime to terminate it in unusual way.Please connect the aplication support team for more information.

I would be really grateful if someone help me and other users who have the same problem.
PS: I can send DxDiag on pm if someone can help me out.