@Prabhu-K
See https://docs.duet3d.com/en/User_manual/Reference/Gcodes#m950-create-heater-fan-spindle-or-gpioservo-pin
M950 with a K parameter is for defining spindles, it doesn't relate the pin to the probe, so remove them from your configuration. As @Phaedrux says, the second servo pin should have S1 in it. So those two lines should be:
Also, you will need separate deployprobe and retractprobe for each probe. See https://docs.duet3d.com/en/User_manual/Tuning/Macros#bed-probing
If you have more than one Z probe, then use deployprobe0.g and retractprobe0.g for probe 0, deployprobe1.g and retractprobe1.g for probe 1 and so on.
deployprobe0.g
M280 P0 S10retractprobe0.g
M280 P0 S90deployprobe1.g
M280 P1 S10retractprobe1.g
M280 P1 S90Ian