Okay, so my boot decided to jam itself shut and wont open.

i called up bmw they told me it was £99 to find the problem.
erm........ think i might give it a go first, save that as a last resort.
1. Ive managed to undo the rear panel and open it manually.
2. i have no voltage signal when i push the open button on the boot. the motor makes no noise when i go to open it whether its opening it by the remote or the button on the boot handle.
3. ive also checked the fuses with the padlock signs and they seem okay.
im guessing it might be a relay however i dnt actually know. my car is in pieces again

i was wondering if anyone had any information on what might be wrong.
also if anyone has the wiring diagram to the lock and relays of the boot.