how to mix channels on a dx3r?

[patxeik]

hi guys!!!
Im finishing the conversion of my tekno mbx5t, but im not able to mix the throttle channel (esc) with the auxiliary chanel (servo for mechanical brakes).
Those are the steps that i made in my dx3r:
1-ESC into throtle chanel. servo into auxiliary channel.
2- MIXA
3- Master--- throotle, Slave-----auxiliary.
4- I put in one side like -30% and in the other side +30% (have tried lot of confidurations but the servo never moves)
5- im going to main menu, turn on the esc and the motor spin but the servo doesnt move.
Any help?
thanks a lot!!!!