[flexcoders] alternating row color in bar chart -- Problems

[Mark]

I have a barChart that is using <mx:DateTimeAxis> for my 
horzontalAxis.  I have my backgroundElements set to an Array that 
looks like...

<mx:Array id="bge">
     <mx:GridLines direction="horizontal">
        <mx:horizontalFill>
           <mx:SolidColor color="#EEF3F7" alpha="1"/>
        </mx:horizontalFill>
     </mx:GridLines>
</mx:Array>

It works but the last row has a line right across the middle.  
Everything I've tried to get rid of it doesn't work.  Has anyone seen 
this, and if so gotten rid of it?

Thanks,
Mark