Here are some pointers.
Have you observed the output of the PWM on an oscilloscope to find out if the expected frequency and duty cycle is being generated?
How are you deriving the 1MHz input clock to the PWM?
What is ClockSync parameter set to? The right setting would be SyncToSysClk
Is the servo motor getting sufficient current?
If you are using the power from a DVK, make sure the regulator can supply the required current to the servo.
Also, archive (ZIP) your project and post it here, so that others can have a look at the code.
Problem solved in other post.