Did you exit the house and return, so the positions were reset? That combination should work...
Unfortunately, IIRC neither the magic or regular lockicks will open that door. It shouldn't matter that you have not been to the castle or the dwarven halls (I did it before going to the castle or the Dark Forest).

Sir Patrick's levers


BTW, you can get the magic lockpicks back, if you wish;
Lost Items - guide and directory of inventory files (see the second reply)