First, change the enumeration name 'STEAL_POS' to something else, not too great having an enum + variable with the same name, it could confuse things.
If you can't seem to make it walk to the position, perhaps try getting it to walk to a 1x1 area instead ? (yes, this is possible).
For example:
public Area STEAL_AREA = new Area(3270,3412, 3270,3412);
Then when you want to walk to it, just call the code
localWalker.walk(STEAL_AREA.getRandomPosition(0));
and that should work (idk, can't remember the syntax off the top of my head but i think that's right
EDIT:
also, don't be afraid to overextend the area to the other side of the wall. this could be the area: