This is for a tower Uproar ARF

Tx 9CAP Super with campac Rx Fut R-148DP

Once I have the Flapperon active ch 1 + 6 Ch six is set to VR-D and elv to flap mix switchable on/off

The problem is that I have no flap only control from VR-D I tried other VR same no flap only movement.

What did I do wrong?

thanks Bob