PWM issue using PCI7344 with UMI-774 from MAX and motion assistant

Hi,

Setup:

I am using PCI-7344 motion control card interfaced with UMI-7774 to control 4 servo motors. I configure the Axis from MAX software as servo and enable PWM from PWM settings. I have placed an oscilloscope on the output of UMI-7774 to monitor the output, PIN-1 and Pin-9 on pig-tail connector. I program 1-D motion on NI Motion Assistant 16.0 to move straight line in both direction i.e +5000 counts and -5000.  

Issue:

When I change the PWM duty cycle from the MAX software still the output pulse remains the same. How can I change the duty cycle using max and motion assistant?

Thanks.