Output Conn Error??

I got a practically new 3S 3300mah ProTek lipo for my other tx - I'm already using one in my 3pk. I hooked it up to my 0610i charger last night following latest advice from Hyp - main power leads 1st, then balance connector. Soon as it gets to my input charging rate, I get beeping and a msg that says "out connect error" or something like that and charging stops. I can charge it without the balancer connected - no probs, I can balance it without charging - no probs.

When I try to do them together, I get the error. Doesn't happpen with the other one of these I have. Anybody got idea what's going on?