I think Shaun is onto the right path. Fly with another instructor, and do not allow him/her to intervene unless saftey becomes an issue. Also, look at this not as a block or hinderance, but as a milestone. It's amazing what good training will do for you if things go bad. I was frightened about doing spins for my CFI rating but did it quickly subsided after the first one. I did what I had been trained to do, and it worked well. Use your checklists, think ahead, and when in doubt, ask. Don't be afraid to sound like a student, you are one. In time the fear will subside and you'll enjoy not having your instructor squawking at you over the intercom.