i only have a limited knowledge of this gear but as for the bms idea these are the batteries ive purchased
http://cgi.ebay.com/ws/eBayISAPI.dll...EOIBSA:US:1123
they wouldnt come with a bms installed would they?
and i checked out the other post about this simular problem i was thinking it might be the controller as was metioned in the other post any thoughts?