I have a new customer setting up his site on a cpanel server. He tells me his htaccess files are not working properly. Here is a sample of one of them.

setenv PHPVERSION 5
DirectoryIndex index.php
Options +FollowSymlinks
RewriteEngine on
RewriteRule ^([C|c])anon$ rent_lens_catalogue.php?compatibility=Canon
RewriteRule ^([N|n])ikon$ rent_lens_catalogue.php?compatibility=Nikon
RewriteRule ^([O|o])lympus$ rent_lens_catalogue.php?compatibility=Olympus


Any suggestions on how to diagnose the problem?

Vito