Individual Axis Home but get Homing Error

I’m trying to get my Prusa clone to work. I think I’m close but the machine gives me a Homing Error when I try to either do a print or try to do a general Home command from Pronterface. It seems to home correctly but it gives me a Homing Error. When I home each axis individually, they home correctly, though the Y motor churns a bit before saying it’s homed.

Imported from wikidot