DX7 Flap Programming for 3 position switch

[stemo99]

First, the radio is a DX7 NOT a DX7s. OK I want to use my 3 position flap switch for no flaps, half flaps and full flaps. The wing has 2 aileron servos and 1 flap servo. I am using a 7 channel orange dsm2 HK receiver. The flap channel is channel 7. Following the manual exactly, the only results I get are when the switch is in the 0 position, I get full downward deflection of the flaps. positions 2 and 3 have no effect on the flaps. Even though I input negitive elevator values I get no elevator movement whatsoever. Changing the values in norm, mid and land in the flaps system screen doesn't change anything, still full downward deflection in pos 0 only, no elevator movement. In order to have any functioning flaps, I have to plug the flap servo into the gear channel, adjust the gear travel to where I want the deflection to stop, do a mix with gear master elevator slave. gear switch up, flaps off, gear switch down, half flaps, and down elevator. Why have a flap 3 pos switch that can't be used. Your help is appreciated. Thanks
Steve