And here I was trying to read your post with a German accent & was wondering what St Bernards & German had to do with each other. Guess I'm a bit slow tonight.
try popping the key back off and checking where the key presses the pad inside, sometimes the "button" will get stuck at an angle and won't allow it to work. (may also want to take a vaccume to it to get any crumbs/dust out).
it makes me giggle to think of people trying to read this post vvith a german accent! VVhen i started it, it looked very double uish to me. Novv I am hyper avvare that it is very much not double u like! Novv i am reading my ovvn posts vvith a german accent!