This XML file does not appear

In Mozilla FireFox explorer not able to access XML file . i used http://123.0.0.0/AJAX.nsf/lock?Readviewentries then explorer show me error :- This XML file does not appear to have any style information associated with it. The document tree is shown below.

i am not read xml data but when i used Internet explorer 7 that time i can read xml file .

pls give me soluation .

Exp:-

if (window.XMLHttpRequest)

{

		//alert("XML")

			req = new XMLHttpRequest();

			if (req.overrideMimeType){ //Not in ie7 

					req.overrideMimeType('text/xml'); 

				}

			//req.overrideMimeType('text/xml');

			req.onreadystatechange = processReqChange_lookup;

			req.open("GET", url , true);

			req.send(null);

  			} 

//checking whether browser is IE

	else if (window.ActiveXObject)

		{

// alert(“Active”)

			req = new ActiveXObject("Microsoft.XMLHTTP");

			if (req)

				{

					req.onreadystatechange = processReqChange_lookup;

					//req.overrideMimeType('text/xml');

					req.open("GET", url, true);

					req.send();

       				}

    		} 

}

req = new ActiveXObject(“Microsoft.XMLHTTP”);

if (req)

{					req.onreadystatechange = cessReqChange_lookup;

					//req.overrideMimeType('text/xml');

					req.open("GET", url, true);

					req.send();

       				}

    		} 

var xlmNodeValue=responseXML.getElementsByTagName(‘viewentry’)[i].getElementsByTagName(‘entrydata’)[j].text

Subject: This XML file does not appear

That’s not a “real” error message – it just means that Firefox doesn’t know how to make the XML document display as anything other than source text (but it does know how to “pretty-print” the XML source). Firefox would just love to show you the XML document as, say, a spreadsheet, formatted text or a graphic, but there is no XSL, XSL:FO or XSLT file for it to use.