Naza setup problem

[rockflys]

I bought a tbs discovery with a naza lite w/gps in it. I have a 9x with opentx and FrSky module & D8r-xp rx. I bound the receiver and went to Naza asst. to set up switches,sticks,etc. My problem is the 3 pos. switch I assigned to channel 4 for "Mode Select" The O position goes beyond manual on right end of Naza slider. The 1 position goes to 'Failsafe" and the 2 position goes beyond "GPS" setting on left side of slider. Have not had any luck when reversing the switch or changing endpoints. I am new at this so I may have overlooked something easy. Other channels function O.K. on Assistant but model does not respond to transmitter and VU flashes yellow. Please help!

[Kilrah]

Set switch to middle, adjust subtrim, then adjust the end points with the switch at the respective positions.

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[rockflys]

Thanks for the info. Finally got it set. Now I am getting one green light and 3 or 4 yellows but no mtr. start yet. Going to calibrate compass today & try again. Thanks for your help.