So I'm still pretty new to RC, got a Slash about six months ago, ran it once then got busy w/work. So It's sat for months and now I have some time to run it, put the battery on the charger and I get these messages:

When I try and balance charge, it says "Balancer No Connect" even though it's plugged in.

When I try and regular charge it, it reads, "ERR Batt Low Voltage".

I'm using an Passport Ultra set at 5A/7.4v/2S, w/a Gens Ace 7.4v/2S/5000mah LiPo which was brand new when I got truck, only charged one time.

Any direction/info would be appreciated.