[flexcoders] Overriding drawRowBackground

[markgoldin_2000]

Here is code:
override protected function drawRowBackground(s:Sprite, rowIndex:int, 
y:Number, height:Number,color:uint, dataIndex:int):void
   {
        if (rowIndex ==3)
          color = 0xFF0000; 
        // call the super function to make it happen. 
        super.drawRowBackground(s,rowIndex,y,height,color,dataIndex);
   } 

It works fine and I get the row colored.
Later on, I am changing column background:
dgc.setStyle("backgroundColor", bBackgroundColor);
and I am losing my initial row color. How can I protect it from 
changing at all?

Thanks