1-3pos switch to throttle (OFF-MID-FULL)

Hi,
I'm a noob and using iRangex-iR8M and latest Deviation. I have a problem that I cannot config throttle channnel with Switch-C properly.

I just want to config are:
SW-C
SWC2 ---- Motor OFF (output=-100)
SWC1 ---- Motor slow (0)
SWC0 ---- Motor Full (100)

In th Model Menu->Mixer->(THR) Complex->Made 2 pages.
1page : SW=SWC2 MUX=replace Curve=Fixed Scale=-100 offset=0
2page : SW=SWC0 MUX=replace Curve=Fixed Scale=100 offset=0

it's all but not worked fine ...