Switch the radio on as you would if entering the code ( By pressing AS button and switch/press ON button at the same time)....now leave it UNDISTURBED until it resets itself.( note: you may have to wait several hours depending on how many wrong codes have been entered)
Once it has reset then enter the code , press AS again and if correct you should hear a beep in the speakers.
Any queries contact via
http://tinyurl.com/4ydhop
RegWorts, June 2008