You are using a proprietary IE-enhancement - the <xml> tag inside of HTML.
Take a good read around at www.w3.org to understand how XML is supposed to be included in documents.
To generalize it, you are not supposed to be able to "include" XML data inside an HTML page without importing it through DOM methods, such as Document.prototype.load()
ok thanks, i already found a page explaining this. the example given seems to work with netscape 7