[RMcNeal]

With shore power hooked up, what is your voltage at the battery? If the converter is charging, it should be over 13 volts. If not, then the converter is not charging the battery. Check that the cross polarity fuses on the converter are not blown. Hooking the battery up backwards, for even an micro-second, will blow them. Mine has 4.
These would be the first things to check.