Hi all, I just bought an AXE CP for my first heli

I have been flying on the sim for awhile and I think I am doing ok with it. One problem I just ran into though...and I also posted this in the battery fourm but I thought I might get a quick answer on this thread since you all have already made the upgrade.
I just bought the Greatplanes Lipo that was recomended to go with the AXE-CP GPMP0709 (
http://www2.towerhobbies.com/cgi-bin/WTI0001P?&I=LXNYJ1) and the Electrifly balancer but none of the adapters that came with the balancer fit the battery. It says the 3S is for 11.1 packs which is what I have but the plug is too small to fit the battery.... what am I missing here?
Edit to say I think I figured it out....the 3S adapter is the wrong one...its the one for the thunder....guy I bought the balancer from at the hobby shop said he had gave the one that came with it away and bought the replacements but it looks like he bought the wrong set....