Unity Player

I recently downloaded the unity player. At first everything worked great, now it will not load. Message says bad file length. Can anyone tell me how to fix this problem? Thank You.

Check if you can open other unity3d files... I don't know what you're trying to watch, but the uploaded file might be corrupted. If it's online, send a link and I'll try to open it here.

See if this loads for you: http://unity3d.com/gallery/live-demos. If so, the player is not the problem.

I suggest you update your video card drivers. I don't know the cause of the issue, but updating video card drivers has fixed it for me in the past.