ZYX-S2 gyro uncontrolable, Why?

[Vista10]

I bought 2 of those one for my Blade 500 3D and it does what it is expected to do to control a FBL heli. Dx6i TX and Spektrum Rx.

The second one on my Blade 400 3D, what a mess!
The first part of programming is OK but when I connect the servos the problem start:
3 servos move together, then stop. Moving throtle stick slowly up ok then the 3 servos start going up and down. I use a Tactic 650 TX, 6 Ch and tactic 624 Rx 6 Ch.
I tried that gyro on the 500 and everything works as it should.

I tried with a spektrum receiver and Dx6i with the same result 3 servos are going crazy.

Does anyone have an idea what is going wrong

Thank you

[Bee_random]

Maybe you have it set up for the wrong servo type?

[Harbormaster]

Definitely sounds like a setup problem. Just redo methodically from the start.