Animation Doesn't Play

[campion-kirkham]

I’ve been working on an animation for a week or two and all of the sudden the file no longer plays the animation.
The keyframes are there and I can scrub through them, but when I hit play it just hangs on the frame it’s already on, it says it’s playing (The icon changes to stop and in the corner it says “Hit ESC to stop playing”, but nothing moves.
I can bring it into older versions of Maya and it plays, but the only other version of Maya I have is 2008 and it doesn’t like the transfer from 2011 to 2008.
Any help would be really appreciated, I need to fix this problem ASAP.

[campion-kirkham]

In case anyone else has this problem, I found a "Solution".I made a new project folder, started a new file, and imported the old file into the new one, and now it plays again!