I had the same problem with my 700p. Originally it wouldn't associate at all and would force a reboot of the phone. I deleted the generic profile it had created and re-associated it. It then began to work part time. At times it worked perfectly except that it uploaded the speed dials instead of the address book. At other times it wouldn't upload the address book and occasionally it would force a reboot of the phone. My final solution was to switch to a Motorola Q, which thus far has worked consistently.