I'm having trouble creating a linear gradient

programming flash
1

I am trying to create a linear gradient, with beginGradientFill.

I need it to be a solid color. The middle needs to have an alpha value, and both ends need to fade out to 0.

This is acting weird:


            var backdrop:Sprite = new Sprite();
            backdrop.graphics.beginGradientFill('linear', [gradColor,gradColor,gradColor], [0,1,0], [0,128,255]);
            backdrop.graphics.drawRect(0, 0, 100, 60);
            addChild(backdrop);

Any idea why?