Automatic launch of an app via Omniweb

[mcwilljg at euler.sfasu.edu]

Suppose I have the following link in my web page:

<a href="mathematica_doc.ma">...</a>. 

When I click on this link, Omni web downloads the .ma file and,
recognizing it as a Mathematica document, starts Mathematica and loads the
.ma file into Mathematica.  I have been able to do this on other web sites,
but it doesn't work on my own web site.  

Is there something I must include in my .html files, or in the server
(CERN httpd) .conf file, or something to be configured in OmniWeb?

This has me baffled and I sure would appreciate some expert help.  Thanks.

Joe McWilliams
mcwilljg at euler.sfasu.edu