Getting Mozilla to display MathML in .aspx file

This is probably not the correct place for this post, but perhaps
someone can point me to a good resource. I posted to the general
mozilla support community with no results.

I can get mozilla to display mathML in a .xml file, but not a .aspx
file. How does one get mozilla to display mathML contained in a .aspx
file? A code example would be most helpful.

Thanks in advance.