Using Asp To Generate Xml File On Server

Is it possible in a global.asa file (or some other way) to have an xml file generated by an asp script and saved to the server some how?

<%
Dim xmlDoc, rootEl, child1, child2, p'Create an XML document
Set xmlDoc = Server.CreateObject("Microsoft.XMLDOM")'Create a root element and append it to the document
Set rootEl = xmlDoc.createElement("root")
xmlDoc.appendChild rootEl'Create and append child elements
Set child1 = xmlDoc.createElement("child1")
Set child2 = xmlDoc.createElement("child2")
rootEl.appendChild child1
rootEl.appendChild child2'Add an XML processing instruction
'and insert it before the root element
Set p=xmlDoc.createProcessingInstruction("xml","version='1.0'")
xmlDoc.insertBefore p,xmlDoc.childNodes(0)'Save the XML file to the c directory
xmlDoc.Save "c: est.xml"
%>

THis seems to be what i am after but when I try to modify the xmlDoc.Save line to either "/images/listings/test.xml" or imageslistings est.xml" and it comes back saying it can't find the path. If I just leave "text.xml" it comes back saying permission denied. If I can solve this path issue so as to be able to save the file to a directory I think I will have it solved.