First off, welcome to the board. Second, You'll need to use real words, and proper grammar. So, don't post something like: "Needz hlp plz!!!1 Wat is wrong wit my whip y0?" Doing this will ensure that you receive the helpful responses you're looking for.

That said, How old are the drums? When was the last time they were replaced? Is there a pull in a certain direction when you are braking?
What is your suspesion set up? Etc...

There more info you can give us, the faster we can help you pin-point your problem, or at least, point you in the direction of a solution.