Disable Enable switch

the enable switch is to safety of robot moving in the teach mode and couldn't disable it.

Why do you want to disable it?

ANSI-RIA and CSA mandate the use of a 3 position enabling device as of 2001. It is required in North America and most countries due to safety regulations. There's a reason they used to call it a "DEADMAN" switch - to stop a person from becoming a dead man.