I had a Bluetooth DUN problem getting a new MotoROKR Z6M to connect the tablet....after a successful pairing on all profiles. I went round and round with Alltel for a few days and gave up. The ROKR had my 2GB music memory card in it and I wanted to transfer some of them to the tablet, so I used the tablet's File Manager, clicked Bluetooth and it connected to the phone's memory card. Very curiously, the phone also doublebeeped from this FTP connection and I was suddenly connected to Alltel EVDO on the net! The phone would never respond to the N800 trying to connect to it, before. File Manager's initial connection fixed all that. The ROKR Z6M responds, instantly, to every connection from the tablet's connection box, now, without using File Manager.

Give that a try. Try to get File Manager to connect to your Blackjack by clicking Bluetooth in the File Manager directories panel. Watch for a phone connection at the same time.

Good luck.
Larry