Need Help With Sirius

[kakalika]

I need help getting my [COLOR=blue ! important][COLOR=blue ! important]Sirius [COLOR=blue ! important]radio[/COLOR][/COLOR][/COLOR] to work. I just found out I have a sirius receiver in my 525i touring. It must have been installed by the previous owner. I never knew it was there because the antenna had been removed and just tossed in the compartment where the nav computer is. I discovered the antenna and traced it to the sirius module. Of course I mounted the antenna on the roof and tried to tune in the satellite using the aux button on the radio (in my case, a wide screen monitor), but nothing happens. My [COLOR=blue ! important][COLOR=blue ! important]car[/COLOR][/COLOR] is a 2002 525 i touring with a build date of April 02. It has a factory nav with a Mk 3 computer. Becker BM53 radio unit. The Sirius part number is 84 11 0 153 365. The CD changer connections were connected to the sirius receiver and the antenna plugged into the appropriate connectors. This left one connector on the sirius module empty, but I saw no evidence of a loose cable that could have fitted that connector. There is no connection to the BM53 radio.
Am I doing something wrong, or is the module faulty?

Would really appreciate some help