Getting to the root node of an xml document

(Cross posting, sorry...)

Hello there!

I'm trying to get to an xml document root node (named dataroot), I've
tried different things, like :

Node node = doc.getFirstChild();
Node node = doc.getDocumentElement();
Node node = doc.getElementsByTagName("dataroot").item(0);

None of them seem to work, the "node" variable is NULL everytime.

Here's the start of the XML file, I somebody has an idea, it's be very
helpful :) Cheers!

XML Document :

<?xml version="1.0" encoding="UTF-8"?>
<dataroot xmlns:od="urn:schemas-microsoft-com:officedata"
generated="2007-05-25T20:41:06">
<SITES>
<FECD_ID>18</FECD_ID>
<LATITUDE>55.53</LATITUDE>
<LONGITUDE>-98.41</LONGITUDE>
<SITE_INFORMATION>
<FECD_ID>18</FECD_ID>
<ORIGINAL_SOURCE>Halliwell &amp; Apps, 1997</ORIGINAL_SOURCE>
<ORIGINAL_SOURCE_ID>MAN TE-OA (1)</ORIGINAL_SOURCE_ID>
<ESTABLISHMENT_DATE>1994</ESTABLISHMENT_DATE>
<PROVINCE>MB</PROVINCE>
<TERRESTRIAL_ECOZONE>Boreal Shield</TERRESTRIAL_ECOZONE>
<TERRESTRIAL_ECOREGION_TEXT>Churchill River Upland</
TERRESTRIAL_ECOREGION_TEXT>
<ORDER>Brunisolic</ORDER>
<SUB_GROUP_GREAT_GROUP>Gleyed Melanic</SUB_GROUP_GREAT_GROUP>
<DRAINAGE_CLASS_ID>Imperfectly</DRAINAGE_CLASS_ID>
<FEATURE_DEPTH>33</FEATURE_DEPTH>
<SOIL_FEATURE>Carbonates</SOIL_FEATURE>
<ROOTING_DEPTH>53</ROOTING_DEPTH>
<DOMINANT_TREE_1>POPU TRE</DOMINANT_TREE_1>
<CODOMINANT_TREE_1>POPU TRE</CODOMINANT_TREE_1>
....

Part of the code :

public class WWXMLSitesLayer extends IconLayer implements
SelectListener {

    public WWXMLSitesLayer(String fileName, String layerName)
    {
        this.setName(layerName);
        this.loadIcons(readXML(new File(fileName)), layerName);
    }

    // Load icons from XML document named layer
    private void loadIcons(Document doc, String layerName) {

        // Get LayerSet node
        // Node node = findLayerSetByName(doc, layerName);
        Node node = doc.getElementsByTagName("dataroot").item(0);

        if(node == null)
        return; // TODO: throw exception

                loadLayerSet(node);
    }

    // Load icons from a LayerSet node (recursive)
    private void loadLayerSet(Node node) {
        // Process icon child nodes
        Node child;

        for(int i = 0; i < node.getChildNodes().getLength(); i++) {
                // child = node.getChildNodes().item(i);
                child = node.getChildNodes().item(i);
                //if(child.getNodeName().compareToIgnoreCase("SITES")
== 0) {
                // loadLayerSet(child); // recurse
                //}
                //else
if(child.getNodeName().compareToIgnoreCase("SITES") ==
0) {
                        // Get icon info
                        Node n;
                n = findChildByName(child, "SITES");
                String name = n.getTextContent();
                n = findChildByName(child, "LATITUDE");
....