Arduino Uno and Motor Driver DCTS-600

Hello. I'm new with electronics. I have a problem connecting motor driver to arduino.
My driver has an ability to control motor speed via pwm signal.

Here is the short datasheet of my driver
http://www.purelogic.ru/files/downloads/doc/Driver/DCTS-600_Purelogic.pdf

The motor is very powerful so I bought this kind of driver.
Here is the short description of my motor
http://www.kzae.ru/products/reductors/product7.shtml

In the purelogic store support I was told that the reason is that the frequency of the driver input pwm signal differs from arduino frequency

drivers frequency 1 KHz - 10 KHz
arduino frequency about 400 Hz or 900 Hz

Is this a reason of my problem?

If so could someone tell me how can I solve this.

Thanks in advance.