An error on converting MathML to LaTeX

While using Dr. Carlisle's stylesheet mentioned here to Convert MathML to LaTeX, I am getting the following error:
"The specified node cannot be inserted as the valid child of this node, because the specified node is the wrong type"
My XML file has following content:
<?xml version="1.0"?>
<math xmlns:mml="">
I think, I may be missing something simple. Please help.

Received on Thursday, 25 December 2014 02:41:34 UTC