Issue on converting MathML to LaTeX using third party parser for XSLT2.0

 I am using a stylesheet from Dr. Carlisle mentioned here: http://tex.stackexchange.com/questions/85639/i-want-to-convert-mathml-to-latex
When I use the Saxon-HE 9.6, both the Java and .NET version of the Saxon give me the following output for the xml file shown below. The output does not look right - is it because of the version of Saxon I am using? Has anyone used Saxon-HE on the stylesheet mentioned above and got the correct LaTeX? Is there anything else I may be missing? I've latest versions of Java and .NET installed on my windows 8.1 machine.
Output:\[\let\par\empty
{\msup{a}{{2}}}
\]
Source:<?xml version="1.0"?>
<math xmlns="http://www.w3.org/1998/Math/MathML">
  <msup>
    <mi>a</mi>
    <mn>2</mn>
  </msup>
</math>