[flexcoders] Problems walking XML file with E4X

[Nate Pearson]

So I'm new to this whole xml thing (i usually use objects).

I have this xml file:
http://trail.motionbased.com/trail/export.mb?episodePkValues=5413584&trainingCenterExport.courseMode=true

The structure is like this:
<TrainingCenterDatabase>
   <Courses>
      <CourseFolder>
         <Course>
           <Track>
              <Trackpoint/>
              <Trackpoint/>
              <Trackpoint/>

I want to get to the Trackpoint data.

In my App I have (I renamed the file):
<mx:XML id="dataSet" source="data/frankTT.xml" format="e4x" />

Then to put it into an XMLList I go:
var myXML:XML = dataSet[0]
var myXMLList:XMLList = myXML..TrackPoint

That doesn't work though, myXMLList is empty!  How do I walk this file?

Thanks!

Nate