Uhmm,
you are searching for the Certificate in Sir Patricks mansion, aren`t you? <img src="/ubbthreads/images/graemlins/think.gif" alt="" />
I think you cannot enter the door to it by picking locks.
The lever combination is:
1.upper left
2.down right
3.middle
This will open the door to the certificate.
Hope this helps! <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />