VMC 760 HOMING ISSUE

Bridgeport VMC760 will not home in z axis. It goes up passes the limit and then stops. The maintenance page shows that the limit switch is working properly. The parameters are set correctly. Cannot for the life of me figure out why this thing won't go home. Help!!!!

Assuming a mechanical switch; use a DMM to test if that limit switch is operational and signal when triggered. If not (I suspect), replace the switch (suggest replacing all of them).