[flexcomponents] Problem with gradients

[lytvynyuk]

Why
     var fillColors : Array = [ 0xFF0000, 0xFFFF00];
     var fillAlphas : Number = 1.0;
     var cornerRadius : Number = 10;
     graphics.clear ();
     drawRoundRect (0, 0, unscaledWidth, 20, cornerRadius,
     fillColors, fillAlphas,horizontalGradientMatrix(0, 0, unscaledWidth,
     unscaledHeight));

and

     var fillColors : Array = [ 0xFF0000, 0xFFFF00, 0x0000FF ];
     var fillAlphas : Number = 1.0;
     var cornerRadius : Number = 10;
     graphics.clear ();
     drawRoundRect (0, 0, unscaledWidth, 20, cornerRadius,
     fillColors, fillAlphas,horizontalGradientMatrix(0, 0, unscaledWidth,
     unscaledHeight));

doesn't???!