overriding background color - color lost on mouse roll-over

[Style(name="rowBackground", type="uint", format="Color", inherit="no")]
public class MatrixcolorRenderer extends Label { 	 
override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void{
			super.updateDisplayList(unscaledWidth, unscaledHeight);
			var g:Graphics = graphics;
			g.clear();
			var color : Object ;
			color = getStyle("backgroundColor");
			
			if(listData != null){
			var grid1:SaveDataGrid = DataGrid(DataGridListData(listData).owner);
			if (grid1.isItemSelected(data) || grid1.isItemHighlighted(data))
			return; 
			var  smTolm:String = new String();
			smTolm = String(data[DataGridListData(listData).dataField]);
			var pair:Array = smTolm.split("|");
			
			if(pair.length == 2){
							
				if(pair[0] == "CEO "){
					
					if(Number(pair[1]) > 0){ 
						g.beginFill(0xff0000);
						g.drawRect(0, 0, unscaledWidth, unscaledHeight); g.endFill();
						g.endFill();							
						data[DataGridListData(listData).dataField] = pair[1];  //This is not working. any idea why
					} 

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public class Customgrid extends VBox 
	{
		private function buildColumnModel(complexheaders:Object,fields:Object):void{
			var headerCollection:Array = complexheaders as Array;
			fieldCollection = new ArrayCollection();
			var columnIndex:int = 0;
			var columnArray:Array = new Array(); 
			var column:AdvancedDataGridColumn;
			var index:int = 0;
			for(var i:String in fields){
				fieldCollection.addItemAt(fields[i],index)
				index++;
			}
			for(var j:int=0;j<complexHeaderCollection.length;j++){
				var complexHeader:Object  = complexHeaderCollection[j];
				var fieldObject:Object = fieldCollection.getItemAt(columnIndex) as Object;				 
					var Singlecolumn:AdvancedDataGridColumn = new AdvancedDataGridColumn();
					Singlecolumn =  createColumn(columnIndex,fieldObject);
					columnIndex++;
					columnArray.push(Singlecolumn);
				 
			}
			dataGrid.groupedColumns= columnArray;
			 
		}
		
		private function createColumn(columnIndex:int,fieldObject:Object):AdvancedDataGridColumn{
			var column:AdvancedDataGridColumn = new AdvancedDataGridColumn();
			column.headerText = fieldObject.defCaption;
			column.dataField = "col"+columnIndex;
			var factory:ClassFactory;
			var textAlign:String ="left";
			column.editable = false;
			column.showDataTips = true;
			if(fieldObject.hasOwnProperty("textAlign")){
				textAlign = fieldObject.textAlign;	
			}
			column.setStyle("textAlign",textAlign);
			 
			
			if(fieldObject.hasOwnProperty("resizable")){
				column.resizable = fieldObject.resizable;	
			}
			if (fieldObject.hasOwnProperty("display")) {
				column.visible = fieldObject.display;		
			}
			if(fieldObject.hasOwnProperty("cellEditable") && fieldObject["cellEditable"] == "true"){
				column.editable = true;
				cmtryCol = column.dataField;
				//applying header color
				var dgHeaderStyles:CSSStyleDeclaration = new CSSStyleDeclaration(".myHeaderStyles");
				dgHeaderStyles.setStyle("color","#078df0");
				column.setStyle("headerStyleName", "myHeaderStyles");
			}
			if(columnIndex == 5 || columnIndex == 6 || columnIndex == 7 || columnIndex == 8){  
				column.itemRenderer  = new ClassFactory(MatrixcolorRenderer);  // My Renderer
			}
			//For Number formatting
			if(fieldObject.hasOwnProperty("format") && fieldObject["format"] == "number"){
				column.labelFunction = formatData;
			}
			if (fieldObject.hasOwnProperty("width")) {
				column.width = fieldObject["width"];	
			}
			if (fieldObject.hasOwnProperty("sortable")) {
				column.sortable = fieldObject["sortable"];	
			}
			return column;
		}
}

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