Hi, Ive got the same problem and after Googling it I came here. Ive punched this sequence of numbers in but it did nothing. There was no sound to indicate I had done it right, and no sound to indicate i had done it wrong. However, 3 or 4 mins later it continued to beep regularly every 3 or 4 mins or so. 
Us there a way I can hack into this? 
Many thanks
                
 mikewazowski
                
 May 2013