Z4 Roadster (E85) New Alarm system doesn't work

I recently purchased a BMW Z4 alarm system for my 2004 Z4 and installed it myself. I had my local dealer activate the system and test it. It did not work and the dealer did not have any idea why. The dealer did confirm that the alarm system I bought was the correct part for my car.

This is what I have done so far to diagnose the problem;

• Checked the fuse (F30, 7.5 Amp) and it was okay.
• Disconnected the hood switch and tested the rear motion detector which failed to go off.

Does anyone know if disconnecting one of the alarm switches will allow the others to remain active and functional?
Does anyone have a suggestion on how to diagnose the problem?

Thanks for your help.