Add Slider to Datagrid?

Thanks for your help. I got the slider in the dg. But I cant find out how to move it down a little. for now its stuck at the top. Any suggestions?

How I assign the cell to DG

col3 = dg.getColumnAt(3); 
col3.cellRenderer = LoaderCellRenderer;

LoaderCellRenderer

package ControlPanel.CommonFiles.Util
{
          import fl.controls.Slider;
          import flash.events.Event;
          import fl.data.DataProvider;
          import fl.controls.listClasses.ListData;
          import fl.controls.listClasses.ICellRenderer;
          public class LoaderCellRenderer extends Slider implements ICellRenderer
          {
                    protected var _data:Object;
                    protected var _listData:ListData;
                    protected var _selected:Boolean;
                    private var _selecteditem:Object;
                    private var _sliderValue:Number;
                    public static var _stage;
                    public function LoaderCellRenderer()
                    {
                              super();
                              addEventListener(Event.CHANGE, onSelItem);
                    }
                    public function onSelItem(evt:Event):void
                    {
                              _value = evt.target.value;
  
                    }
                    public function get data():Object
                    {
                              return _data;
                    }
                    public function set data(value:Object):void
                    {
                              _data = value;
                    }
                    public function get listData():ListData
                    {
                              return _listData;
                    }
                    public function set listData(value:ListData):void
                    {
                              _listData = value;
                    }
                    public function get selected():Boolean
                    {
                              return _selected;
                    }
                    public function set selected(value:Boolean):void
                    {
                              _selected = value;
                    }
                    public function setMouseState(state:String):void
                    {
                    }
          }
}