Driver door window

[iLLuZi0n]

Today, I was driving somewhere, put my driver's window down, and it worked fine. Parked my car for about an hour and a half, then got back in it. Tried to roll down driver window all the way, but at the end, came out of track and stopped. It would roll back up fine from there, tried to put it back down, and same thing happened. I came home, my brother and I popped the driver door panel off, and couldnt see any problems. Any ideas besides taking it to the dealer?