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="" />

....und eine Erdnuss für Hunger bitte.