First of all, in your RC receiver you have attached the wire that comes from the PXFmini CH9 (RC Input).
This RC INPUT of the PXFMini needs to have as input a PPM_SUM type.
The RC Receiver you have has 6 parallel channels as output. You need to sum up those signals into one.
For that a PPM_SUM is normally used.
So you have to translate & connect:
6x channel out RC Receiver -> PPM SUM IN -> PPM SUM OUT (6x CH sum up) -> PXFMini CH9 (RC IN)
The PPM MUX is a widely available part, you can purchase it lots of stores. It looks like this:
You need to plug from your RC receiver 6x channels, mantaining its order, to the Input of the PPM SUM.
Hope it's clear