How to make this type="hide" work?

[dezkit 28]

class inst_mid1
		{
			type = "hide";
			source = "aoa";	
			selection = "inst_mid1";
			minValue = rad -2;
			maxValue = rad 10;
			hideValue = rad -10;
			unhideValue = rad -2;
		};

this code doesn't work.

I am trying to make it hide from -10 to -2 and 2 to 10

-2 to 2 should be visible.