I screwed all the studs in tight and used threadlock. Everything went ok until i dropped the car down to find that the handbrake is completely stuck! I carefully tried to ease the car forward coming off the clutch but that corner was just squatting, not budging.

I'm guessing the studs have gone too far and jammed the handbrake mechanism. Any ideas?!
The car in question is 325i so has rear discs.
Cheers in advance,
Max