i found the solution (i suppose). i deregistered the device.then i skip the registration.then i switched off the nook and the i inserted the sd card with gabriel touchnooter 2.1 software. after powering on my nook was rooted. after this i registered my device with oobe registration icon.everything went on with brreeze. i don't understand why it works this way .
I thank you all who helped me in this