Manipulate XSL using DOM for sorting

[Muddmuse]

I've got a method that returns and XML string. It is loaded into the DOM, along with an XSL file and transformed into HTML. I'm creating a <xsl:sort/> node dynamically when the XSL is loaded into the DOM. The sort node does get created correctly but the sort does not take affect. If I do not create the node dynamically, but hard-code it into the XSL file, the sort does take affect (this is not an option however). When I copy the XSL with the dynamically created sort node into XMLSpy and transform it with the XML the sort does work! It is only when I run my .asp page that the sort does not work. Any ideas why?

ps. the parser in both the asp and XMLSpy is MSXML4.