Too little info to guess,
What is motor 1/2 ? Is that what the output says? the 298 if for two motors. Make sure you aren't switching up the sides
Do you have a common ground between arduino and board?
--If you are using in1 , in2 (for arduino pins 7,8) the pwm should be applied to enA ( arduino 9) and the motor should be plugged into motor 1 (A).
--If using in3, in4 pwm should be applied to enB and motor in number 2 channel (B).