I don't have a Blackberry Pearl, but I do have a HTC Mogul that wouldn't pair. I would try and it would seem to connect, but then get kicked off almost immediately.
I took the Edge back to the dealer to see if I was mucking it up somehow. They pair 2 different phones to the system while I sat there. Mine still wouldn't pair. Called Qwest (my service provider) and they sent me a new phone ... the bluetooth stack was the problem.
Anyway! Now all is fine and I love it!
You could be having a bluetooth stack problem as well. Have you paired your phone to a computer or anything? If it is a stack problem you probobly can't pair to that either. If you can't pair any other phone to your sync, it could be the stack in the car.
Hope that helps.
Tammy