I know it doesnt work because I click upvote and it doesnt assign any points while a friend sitting right next to me could do the same thing and assign points. Both he and I have under 100 Karma points
In short, what have you tried? You're really not giving us much to go on ...
Do you write programs for other people to use? What do you do when they say "It doesn't work!" And give you no further information?