Configuring EMC with Freqmod

I'm trying to get EMC to work with freqmod. I have one axis
connected. I'm trying to jog the stepper, but I can only get X Step
pulses when I press the - button. The + button works one-time when I
first enter the program. The display increments, but I don't receive
any X step pulses. The - button works fine.

Does anyone have any ideas?

Thanks,
ww2k