at the end of the charger (where it plugs into your cpu) there should be an indicator light that will glow orange if youre charging and green if you're fully charged...if it doesnt call tech support or go on the apple website
yea it glows when it charges... it just doesnt charge when the computer is on... unless its fully charged (green).. sorta fucked up.. i checked out apple website.. im going into the store soon hopefully