Geeetech

I have set up my printer and am using the GEEtech software,
I can move the axes to Zero but not past zero and I need to do this to get the print head close enough to the heated pad.
The screen shows all three axes at zero

The link http://www.geeetech.net/firmware/EasyPrint.msi does work in Chrome BUT it takes a while to download and then run.. watch the bottom left of the screen!!