Sorry I missed that above. I had a little bit of trouble programming mine too, I have a Spektrum DX3.0, remember that when you turn it on it first goes thru all the beeps for your batteries.

First thing to check is that the throttle is NOT set to "REV" on your DX2, mine was and that messed it all up after that I basically held the throttle trigger in and then turned on the MMM then I let it go thru its warm up beeps, til I saw the proper lighting sequence for WOT, then quickly go to full brake, dont stop at neutral, wait for the lights, then neutral and wait then you are done. Hope that helps.