Is my camera charging? How can I tell why battery will not accept charge?

I bought a new KAA2HR battery from mailorderbatteries.com and it seems to be OK but will not accept a charge from my Kodak 6000 camera dock.
So now I wonder if the original battery was not faulty but was not being fully charged. Alas, I cannot see how to check the dock because the connection to the camera (and thus the battery) is a multipin minisocket.
Any clues please?