I use the same method as posted by Fernbay, post 15 here on my DM 500s.
Make sure your power supply is strong enough.
Make sure you have not over tightened you f connector on the Motek, you may have twisted the connector off the circuit board inside the unit.
It just needs to be re soldered on...yep happened to me, sometimes it just wouldnt work.
Edit there is also a link in there that goes to the pli website for extra instructions.
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