Original rotation and clear rotation are messed up

Hello

I am working on an oblivion model, i was making the animation.

But i came across a problem, and i don’t even know how i ended up doing the mistake.

When i am on frame 1 the model is on the right position, but when i move on any following frame, it goes into a wrong angle

http://img58.imageshack.us/img58/6117/rotationproblemshv7.jpg

anyone have an idea of how to fix it?