flex radar chart

Question

here is the the radar chart

for that chart the data provider is

 subject = ["A", "B", "C", "D", "E", "F"];
var ac:ArrayCollection = new ArrayCollection();
var ac1:ArrayCollection = new ArrayCollection();
for (var i:Number = 0; i<subject.length; i++)
{
 Alert.show(" the val is"+subject[i]+" val"+i);
 ac.addItem({subject: subject[i],R1:100+i});
}
arraycollectionvar = ac;

i want to use XML data to that chart i tried am not getting

the full project code is tht in link text it's open source .....