Thank You Turbo_Bimmer, great suggestion.
I took the plastic cover off around the battery yesterday and checked the Radio Module connection there, but you have suggested i may need to remove the CD-Changer and Nav which are in the side pocket..... So am i looking in the wrong location?
Perhaps i have my connections all mixed up?

EDIT: Photos removed, as they did not represent my X5, actual pictures taken and posted further on in this thread.