Graupner MC-16/20(Crow Brake's)

[Malcolm2009]

Help required setting up Graupner MC-16/20 (Crow Brake's)
I have set the servos 2 left aileron,6 left flap,5 right aileron,7 right flap,to work in the correct directions.
I have set Freely programmable mixer 'A',to mix the ailerons & flaps as follows-
'A' Mixer Ach 26
ASW ON
MIX-25%
OFFSET 0
And ALL the flap & ailerons work in the correct directions.

When I set the crow brakes up with Mix SAO & SFO as follows-
MIX SAO-40%
OFFSET 0

MIX SFO-40%
OFFSET 0

And then operate Throttle control to deplore the crow brakes the No6 left flap servo goes in the wrong direction, but No7 right flap goes in the correct direction.

The 2 left aileron & 5 right aileron go in the correct direction.

Can any one please help me to set the model up correct for the crow braking?
ie- To get No6 left flap servo going in the correct direction?