I just resolved my problem with my 2003 x5 that had a CPT-8000 phone originally installed, and thought others could use the info. Seems the wiring on these is quite a bit different then what the pairing cradle and ULF is expecting. Basically, it would not charge nor enter pairing mode.

So, on the pairing cradle side of the connector, you should have 4 wires. Move these four wires to the following pin locations within the connector.
Brown - Pin 2
White - Pin 7
Green - Pin 9
Red - Pin 10

Hope this helps those that have had problems with similar setups.