Having some charging issues...

[HummerMan]

Ok, I will start off and say I have a SuperBrain 989 charger, Hyperion LBA10 Balancer, and MaxAmps 8000mah 2s Lipo. I've already ran the battery in my Mamba Max 5700 Rustler. I tried charging once I had all the wires soldered up and it told me it was fully charged in a few minutes. I ran the truck til it stopped. Had the cut off at 6 volts, as per MM's instructions. But I can't get it to start recharging. It tells me the polarity of the battery is backwards, and the volts are to high. Am I missing anything? Thank you for any and all help!