"Z" will not 'Go To Zero'

[gene8522]

This morning I was making a tool change and raised the motor. When I did I hit the limit switch on the 'Z' going to the + side. I reset the switch, and nothing would work. No motors would move. I finally saw that the "offline" was lit. So I reset it. But now when I press "Go to Zero" the Z goes to the + and will not zero. I rebooted the computer, and tried all the normal things. I can move the three axis by jogging them and they move as they should. Is there a switch in Mach3 that needs to be reset? 
 

[Hood]

Have you got home switches set up? Do you have soft limits enabled?
Go to Zero will move your axis to the current offsets zero position but you may not be able to reach there due to soft limits.
Hood