I had the exact same problem. I never resolved it. I've since had the tuner sitting on a shelf waiting to be installed in my new car.

See here:
http://empeg.comms.net/php/showflat.php?Cat=&Board=offtopic&Number=145660&page=&view=&sb=&o=&vc=1

and here:
http://empeg.comms.net/php/showflat.php?Cat=&Board=bigs&Number=106517&page=&view=&sb=&o=&vc=1
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|| loren ||