Using Sarissa and selectSingleNode

Can anyone help me with the following problem I'm having using the
Sarissa parser. I am running the following java script

var xml = Sarissa.getDomDocument();
xml.async = false; //Load my xml file containing many child Country
elements.
var objNodeList = xml.getElementsByTagName("Country");
//Walk the Dom
var myCountry =
objNodeList.item(sourceCountry.value).getAttribute("Name");
var xpathstring = "//Country[@Name = '" + myCountry + "']";
var xmlCountry = xml.documentElement.selectSingleNode(xpathstring);

For some reason in the Firefox 1.5.0.1 browser the xmlCountry variable
is not being populated.

Does anyone have a suggestion as to how I can get this code to work
properly in Firefox?
Received on Mon May 1 04:33:04 2006