I have read somewhere that if you pressed the button more than 256 times you have to do some trick to get it working again.
Then there is one higher limit you shouldnt pass because then you need a pst instrument to get it working again
Read this link:
http://www.ppbb.com/boards/ppbbphp/showflat.php?Cat=&Board=ARCHIVES&Number=1029451&Forum=ARCHIVES&Words=remote%20not%20working&Match=Entire%20Phrase&Searchpage=0&Limit=25&Old=allposts&Main=1029451&Search=true#Post1029451