Unable to create a tooltip for a line drawn on cartesiandatacanvas in flex

Question

I am trying to draw a line on cartesiandatacanvas. While I am able to  draw lines easily using the canvas.moveTo and canvas.lineTo methods, I  cannot provide a tooltip to the line if I use that functionality. I have  tried creating a label(when ever I draw a line) and adding a tooltip to  it but since I show the lines in a 10*10 grid both vertical and  horizontal there is a overlap and it is confusing.
So now I am trying to create a line object that extends shape or  UIComponent. I cannot add this object to canvas using the addChild  method it does not work. The addDataChild method works but it messes  with the positioning of the line. Can someone help with a solution to  this.
Simply put I want to draw lines on a datacanvas and add tooltips to  them.
Here is my code for the line object:
package
    import flash.display.CapsStyle;
    import flash.display.JointStyle;
    import flash.display.LineScaleMode;
    import mx.core.UIComponent;
    public class Line extends UIComponent
        public var x1:Number;
        public var x2:Number;
        public var y1:Number;
        public var y2:Number;
        public var color:Number;
        public function Line(x1:Number,
                    y1:Number,
                    x2:Number,
                    y2:Number,color:Number)
            super();
            this.graphics.lineStyle(4,
                            color,
                            1,
                            true,
                            LineScaleMode.NORMAL,
                            CapsStyle.ROUND,
                            JointStyle.MITER,
                            1
            this.graphics.moveTo(x1,y1);
            this.graphics.lineTo(x2,y2);
Here is a sample MXML that has a canvas and tries to use the line  object above:
<?xml version="1.0" encoding="utf-8"?>
<mx:WindowedApplication xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" initialize="init()">
<mx:Script>
    <![CDATA[
        import Line;
    import mx.charts.chartClasses.CartesianCanvasValue;
        public function init():void
            var line:Line = new Line(10,10,40,40,0XFF0000);
//          canvas.addChild(line); *Does not Work*
            canvas.addDataChild(line,10,10,null,null,null,null);
    ]]>
</mx:Script>
    <mx:Panel x="60" y="53" width="517" height="472" layout="absolute">
        <mx:PlotChart x="48" y="10" id="plotchart1">
            <mx:series>
                <mx:PlotSeries displayName="Series 1" yField=""/>
            </mx:series>
            <mx:annotationElements>
            <mx:CartesianDataCanvas id="canvas" includeInRanges="true"/>
        </mx:annotationElements>
         <mx:verticalAxis>
           <mx:LinearAxis  id="axis11" minimum="0" maximum="100" interval="10" padding="10"/>
        </mx:verticalAxis>
            <mx:horizontalAxis>
           <mx:LinearAxis  id="axis21" minimum="0" maximum="100" interval="10" padding="10"/>
        </mx:horizontalAxis>
        </mx:PlotChart>
        <mx:Legend dataProvider="{plotchart1}"/>
    </mx:Panel>
</mx:WindowedApplication>

Answer 1

this sovled my problem:
try the following:
# cd /etc
# cp driver_aliases driver_aliases.BKP
# rem_drv sgen
Then try adding it again:
# add_drv -m '* 0666 bin bin' -i '"scsiclass,01" "scsiclass,08" "scsa,0.1.bmpt" "scsa,0.8.bmpt"' sgen
this should come back to the prompt if it is ok.
Then we can check the at the 'scsiclass,01' entry has been added to the 'driver_aliases'.
# cd /etc
# grep sgen driver_aliases
sgen "scsiclass,01"
sgen "scsiclass,08"
sgen "scsa,0.1.bmpt"
sgen "scsa,0.8.bmpt"
after reboot /dev/scsi/sequential was created and tapes bounded to sg