Error with arguements of System.Xml.Xsl.XslTransform during webrequest

Hi Everybody

Im trying to process a webrequest in NAV2017 with System Dotnet variables.

Im currently trying to implement this: http://forum.mibuso.com/discussion/63741/dotnet-for-webrequest - More specificly the part where i strip the response of namespace and soap.

However im having some issues with the Transform function getting the following error:
A call to System.Xml.Xsl.XslTransform.Transform failed with this message: The type of one or more arguments does not match the method's parameter type.

My RemoveNameSpace function looks like this:

Parameters:

Var	Name	DataType	Subtype	Length
No	Source	DotNet	System.Xml.XmlDocument.'System.Xml, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'	
Yes	Destination	DotNet	System.Xml.XmlDocument.'System.Xml, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'

Local variables:

Name	DataType	Subtype	Length
XslTransform	DotNet	System.Xml.Xsl.XslTransform.'System.Xml, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'	
XmlStyleSheet	DotNet	System.Xml.XmlDocument.'System.Xml, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'	
Writer	DotNet	System.IO.StringWriter.'mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'	
XsltNullArgs	DotNet	System.Xml.Xsl.XsltArgumentList.'System.Xml, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'	
XsltNullArgs2	DotNet	System.Xml.Xsl.XsltArgumentList.'System.Xml, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'

Code:

XslTransform := XslTransform.XslTransform;
XmlStyleSheet := XmlStyleSheet.XmlDocument;
XmlStyleSheet.InnerXml(
'<?xml version="1.0" encoding="UTF-8"?>' +
'<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">' +
'<xsl:output method="xml" encoding="UTF-8" />' +
'<xsl:template match="/">' +
'<xsl:copy>' +
'<xsl:apply-templates />' +
'</xsl:copy>' +
'</xsl:template>' +
'<xsl:template match="*">' +
'<xsl:element name="{local-name()}">' +
'<xsl:apply-templates select="@* | node()" />' +
'</xsl:element>' +
'</xsl:template>' +
'<xsl:template match="@*&quot;>' +
'<xsl:attribute name="{local-name()}"><xsl:value-of select="."/></xsl:attribute>' +
'</xsl:template>' +
'<xsl:template match="text() | processing-instruction() | comment()">' +
'<xsl:copy />' +
'</xsl:template>' +
'</xsl:stylesheet>'
);
XslTransform.Load(XmlStyleSheet);
Writer := Writer.StringWriter;
XslTransform.Transform(Source,XsltNullArgs2,Writer);
Destination := Destination.XmlDocument;
Destination.InnerXml(Writer.ToString);

Any directions as to why this fails would be greatly appreciated?