I could use some help on my Lithium Ion Ni-Cad Rapid Max charger. I bought my 18v Ridgid cordless screw gun with 2 batteries, charger and a bag. I charged both batteries when I got it and used one of them. When the first battery was discharged I tried to charge the battery the charger and the battery will not charge at all. The charger light will not come on. Can anyone help me with this problem? Yes it was pugged in and the battery was on the charger correctly.