[flexcoders] xml and dataprovider for simple chart

[y.mauron]

Dear all, 

I have a problem which certainly be very easy. I have a xml varialbe
like the following : 

                var test:String = "<root><entry
id=123><One><y>813</y><x>270</x></One></entry><entry
id=123><One><y>890</y><x>280</x></One></entry></root>";
                var xmlData = new XML(test);

and would like to use this as dataprovider for my chart. Each <entry>
represent a series. (Rem: the number of <entry> entry is not known at
the beninig). I then code that : 
                                                        <mx:ColumnChart 
id="columnChart" height="100%" width="100%"
                                                paddingLeft="0" 
paddingRight="0" 
                                                showDataTips="true" 
columnWidthRatio="1"
maxColumnWidth="1" 
                                                dataProvider 
="{xmlData.entry.One}">

But cannot see the two lines... and even not one...