TI DRV8301 bldc motor control - problem with the PWM

Hi!

I'm using an Three Phase BLDC & PMSM Motor Kit with DRV8301 and Piccolo MCU together with an
 bldc-motor.

When I'm testing my board without the motor the pwm in Phase A and B work. In Phase C it doesn't work(constant low pegel).

Now I'm connecting the board with the motor. Phase A steps to an high pegel and Phase B steps low pegel when I want to

start up the motor.

The control signal from the microcontroller works as I espect.

I've tried the same code with another board and that worked fine. So I think there must be a problem with the hardware of my first board.

Do you have any idea what could be wrong?

Thanks.