how to setup the Z-Probing Repetier? (no replies)

Hi All, I am new on this 3D printer and currently got time to build my own design Delta printer (firmware: Repetier v0.91 rev3 and host: Repetier). It was running fine but no Z-Probing, has been fun.

Today I am installing my Z-probing and need your help.

here are the detail:
-using mechanical switch connected to the Zmin endstop pin (cables connected to C and NC)
-firmware:
-under Mechanic, under Endstops: Zmin at 'Switch on GND, normally open' and pin 'Zmin endstop'
-under Feature, under Z Probing:
-Enable pullup resistor for probe pin: not checked
-Probe triggers on high: not checked
-Probe Position 1: -1,-1
-Probe Position 2: 1,-1
-Probe Position 3: 0,-1
(they just my temperory positions, just for safe testing, short distance)
-Probe start script: G1 X-30 F1000 \n M300 S500 P100 \nM300 S300 P500
-Probe finished script: G1 X0 Y0 F1000 \n M300 S300 P100 \nM300 S500 P500
(two different sound, so I could tell when it start and finised)
(G1 X-30 F1000, to deploy the Z probing's allen key)
(G1 X-30 F1000, to retract the Z probing's allen key)

On the G31 while the Z probing's allen key still on the top, not deployed, I got State: L (just like the Z-Probing documentation said)

When I do G30, I can hear those two sounds, basically right after I hit enter: the Probe start and finished. Basically the problem is: it just deploy and retract the Z probing's allen key but no probe.

what I did wrong? please help... I am desperated, stucked with this for couple hours debug and trial.

thank you guys!