Dsp 0501 Drivers

I've just finished wiring my DSP-0501 hand controller to my 3040, and it's very nice so far, although I've hit something of an issue - I can't seem to successfully switch from C-axis control back to Y-axis control. The shortcut that's listed in the manual (and I use the word manual very loosely) is ON/OFF&Z-/Z+ - however, whichever combination of those I use, I get the message 'Switch grade 1', and the C axis remains active over the Y axis. Short of unplugging the C axis from the DSP board (which I'd rather not have to resort to), is there anything that I can do to resolve this?

RZNC-0501 Users Guide Chapter I Characteristic 1. Totally independent from PC platform; 2. Directly read files from U Disk; 3. Easily process G code or PLT file with super size; 4. Strong system and process file examining function; 5. Easy to update system program; 6. It supports high micro step which makes precise and fast process possible; 7. A11E/A11S DSP controller --Main Information. This is the original brand: RichAuto. DSP controller for cnc router,USB connect,can be use without computer. Suitable for 3 axis. A11E/A11S the same as 0501. The function have improve, use in the same way, A11E/A11S have replaced 0501 from 2015. We have set up the English version before deliver. Detskie risunki moya rodina kazakhstan city.