uap - 2007-05-02

I was trying XML/A examples provided by mondrian. I am getting the error that

The namespace prefix is not allowed to start with the reserved string "xml". Error processing resource 'http://localhost:80...

<xmla:DiscoverResponse xmlns:xmla="urn:schemas-microsoft-com:xml-analysis">
-----------------------^
I can not figure out that what is the error.