6.0: Web Module: xhtml file - code fold does not work on comments.

I have a .xhtml file with the following comment:

<!--
//$Archive$
//$Author$
//$Date$
//$Log$
//$Modtime$
//$Revision$
//$Workfile$
-->

This does not have the option to fold this comment. Is there a setting that I can turn on to code fold comments?

Thanks,

--Todd