I cant get the red light to light up on one of our 6408 D+ sets you leave an audix voicemail and no light, this is a Definity system I've done everything from removing the station and recreating it to removing the voicemail box and recreating it, I even went as far as moving the phone to a different port still no light. I then used a brand new phone out of the box no light. Anyone have any ideas im really stumped on this one.