Is it flybarless or flybarred? Most need six channels, if you are using the Align's own '3GX' FBL controller you need seven, but most other FBL controllers are fine on six.
I have a Trex 600 Pro, I really like it. They aren't without their little issues but once set up they fly real nice. I use mine as a guinea-pig for all my tinkering and I've got it flying exactly how i like it, it's one of my favourites.
So whats' the setup of yours? Is it the Pro (12 cell) or the earlier ESP (6 cell) version?
This is my Trex 600 e pro: