Mixing LED's on Submasters

Hi Guys,

I've been trying to set up RGBW subs for the LED's in a rig. But if I put the red sub to full, then when I push up the green sub slightly instead of mixing it snaps to green.

I believe it is because there are zero values in the colours that should be off, e.g RED: 100GREEN: 0 BLUE: 0 WHITE: 0

So my question is how do I remove these zeros and what settings should the sub have?

Thanks

WillSwep

(The LED's are LEDj Q Colour 18x8w)