HI all,

I am new to umbraco, while upgrading from umbarco 2.+ to 4.5.2, everything is working fine except few things XSLT error, and no CSS is applying.

When I browse the site throwing the error 'Error parsing XSLT file: \xslt\TopNavigation.xslt ' ,

in admin mode when i try to save throwing the error

Error occured

System.Xml.Xsl.XslTransformException: Attribute and namespace nodes cannot be added to the parent element after a text, comment, pi, or sub-element node has already been added.
at System.Xml.Xsl.Runtime.XmlQueryOutput.ThrowInvalidStateError(XPathNodeType constructorType)
at System.Xml.Xsl.Runtime.XmlQueryOutput.ConstructInEnumAttrs(XPathNodeType rootType)
at System.Xml.Xsl.Runtime.XmlQueryOutput.WriteStartAttribute(String prefix, String localName, String ns)
at (XmlQueryRuntime {urn:schemas-microsoft-com:xslt-debug}runtime, IList`1 parent)
at (XmlQueryRuntime {urn:schemas-microsoft-com:xslt-debug}runtime, IList`1 parent)
at (XmlQueryRuntime {urn:schemas-microsoft-com:xslt-debug}runtime, IList`1 parent)
at Root(XmlQueryRuntime {urn:schemas-microsoft-com:xslt-debug}runtime)
at Execute(XmlQueryRuntime {urn:schemas-microsoft-com:xslt-debug}runtime)
at System.Xml.Xsl.XmlILCommand.Execute(Object defaultDocument, XmlResolver dataSources, XsltArgumentList argumentList, XmlSequenceWriter results)
at System.Xml.Xsl.XmlILCommand.Execute(Object defaultDocument, XmlResolver dataSources, XsltArgumentList argumentList, XmlWriter writer)
at System.Xml.Xsl.XslCompiledTransform.Transform(IXPathNavigable input, XsltArgumentList arguments, XmlWriter results, XmlResolver documentResolver)
at System.Xml.Xsl.XslCompiledTransform.Transform(IXPathNavigable input, XsltArgumentList arguments, TextWriter results)
at umbraco.presentation.webservices.codeEditorSave.SaveXslt(String fileName, String oldName, String fileContents, Boolean ignoreDebugging)

please help me.

Thansk in advance.