I just received an OVK diamond series starter kit. I fully charged both batteries (standard auto). When I attach a carto to one of the batteries it is like sucking air through a straw. The carto doesn't fire, and battery does not activate...just sucking in air. I have to suck really hard then it will intermittently fire. The other battery is the same kind and works fine. It seems maybe the battery post on the one battery is not making proper contact with the carto. Is there a way to remedy this?