good day everyone! i had been using the macbook unibody 5.1 2.0Ghz for awhile now, guess probably bout 3 years, my trackpad has some problem, while it still work with multi gesture etc, the CLICKING does not work, i can still tap on the trackpad (ie. 2 finger tap to right click etc) but the 'physical clicking don't work' why is this so? if faulty then the multi gesture should fail as well? anyway I'm running lion appreciate the help!