I've had the same problem,and the responses posted already seem to have hit it on the head...the buttons don't want to work when the phone is "busy". However,I've had them also be a bit sluggish when nothing at all is going on,and found that if I tap the button just above the lighted icon,that it seems to respond better than tapping right on the indicator,or "icon". Don't know if that is common,or just my particular phone??? :confused: