[wireties]

What kind of drive is it?

Isolate the control for each motor in software and test each individually before you use the arcade, tank or mecanum functions. When troubleshooting a problem like this it is important to establish what you DO know and then build on it. Engineers do not guess (well, usually). Perform tests that contribute to the solution. If you jump around trying random things, you may never arrive at a successful solution.

HTH