Keep the trim for throttle all the way in the down position....If you are programming the ESC with the trim in the center, the throttle curve will be messed up.

The Dynam works great if it is set-up properly....The programming card is the easiest way to achieve proper set-up. I have the same ESC and I set it manually with no problems. Make sure that for an out-runner motor, the timing is set to Hard, and with a heli, you always want the brake to be off. It should sound like this if you have it set correctly:
Be Beep (when you first plug in the power meaning brake off). Then Be Beep,Be Beep,Be Beep,Be Beep,Be Beep(5 double beeps meaning that it is set in hard timing).

Follow the instruction that came with the esc and you should be okay.

Peace,

Z

P.S. which radio do you use?