Assembly.CSharp.dll causes Black Screen on Game Build?

Hey Everyone! I build the game I'm making and I run it and get a black screen. So I decided to replace the Assembly.CSharp.dll file in the "Managed" folder in the latest build with an older versions Assembly.CSharp.dll. The games runs fine. HOWEVER, the newer versions scripts have been replaced with the older versions scripts. How can I fix this? I'd like the game to run smoothly at the competition I have in a couple of days, and this one has really stumped me. Is the new Assembly file corrupt, and does it have to do with corrupt scripts in the game? The game works perfectly in engine, so that can't be it. Could the scripts corrupt when built? So many questions and so little time. Anyone who has the answer to this problem please help as soon as possible! Thank you!

Using Unity 4.6.1