Ditto what T5 said. It took multiple tries to get my Samsung SG2 paired. I gave up and went back the next day for one more try...and it paired. Keep trying using the instructions previously posted if you don't have INPA.
Here's a link to a 2005 downloadable (PDF) Bluetooth manual...if you don't have the BMW phone cradle installed...then you have to defer to the "face/talk" button on your MFL steering wheel:
http://www.google.com/url?q=http://w...Vp6DggCo0z-4iQ
Just to be sure...you do have either the premium pkg or the BMW assist pkg, right?