I had problems with binding my new Blade Industrie FPV Pro to my Spektrum DX6i. Looked like it bonded, but nothing happened. This helped my out: link to forum.

So what to do:

You have to adjust (all) the travel to max (here 125%). Note: Use the sticks to switch between high and low. The other thing is to arm the motors: Switch flaps on and off after 2 seconds.

Hope this helps