Scripts

Hey everyone, I have a question. Can you tell me what's wrong?
The situation: there's an elven town belonging to an elf (Player 3). If Player 2 captures it, the quest fails, and the game is lost.

function CheckAnpossal()
         while 1 do
         sleep(5)
         if GetObjectOwner ('houseElf') == PLAYER_2 then
         sleep(10)
         SetObjectiveState('q4', OBJECTIVE_FAILED, 1);
         sleep(10)
         Loose ();
         Trigger(OBJECT_CAPTURE_TRIGGER, 'houseElf', nil)
         break
end
end
end

startThread (CheckAnpossal)

This command isn't working. After the town is captured, nothing happens. There are no errors. Where could I have made a mistake? Thanks in advance.