Help! Cub S+ Flaps's Channel 7CH not actioning the servo/ HELP!!!

[alejo048814]

Hi!
I'm currently installing the parkzone PKZ1090 on my Cub S+ for flaps, and chanel 7, the one for the flaps, wont move it.
I'm currently binded with an DXe with flaps switch and all perfect, and if a connect the new servo on the rudder it works propperly.
Isn't it only plug and play, or what can i be missing. I,ve seen videos and only need is to connect it, then all is ready to work..
Can somebody help me please or advise me?
Thanks

 

[Merv]

Try using channel 5
You may need to enable flaps on the Tx

 

[alejo048814]

Try using channel 5
You may need to enable flaps on the Tx

Yeah it has no screen , i think i have to wait for the cable to eneble the switch on the TX by PC