I had a similar problem and it may be WAY more simple than everyone is making it. If the battery is REALLY low as in it sat on a dealers lot for a while and was demoed with lights etc on it may be too low for the converter (charger) to kick on. This is a safety feature.
I took mine out and ran it to a battery store - a REAL one where all they sell is batteries not a big box. They tested it and said my battery was good. They threw it on their charger and told me to come back in an hour. I threw it back in the coach and hooked it to shore power - it charged right up.
Hope your problem is that simple.
Are you getting any power out of your batt?
__________________
|