See my red replies to your questions/comments:IIRC, the shared SSL certificate doesn't work with PHP (?). Is there any PHP at any step of the process here? Your cgi-bin/ directory is 755 permissions, and directly under public_html/ (in the site root)?
I'm not sure what you are asking or suggesting about IIRC and/or PHP. Again, I have not changed anything except for the link that people go to. They used to (when I had the paid SSL) go to https://www.werentcolumbus.com/payment1.html and now, with the shared ssl, I changed the links to the page to point to what I gave in my opening post. IIRC = "If I Recall Correctly". I'm not sure, but I think you can't use PHP code with a shared SSL certificate. I was asking if you have PHP code on your site.
I tried your page and indeed, it refuses on form "Submit" to go to /cgi-bin/nmspmt.pl. If that's the exact same code you used before, and it worked, I don't know why it wouldn't still work. It says 404 (not found), so apparently it's not even getting to the Perl script (permissions and shebang line are irrelevant at this point). Presumably, your site "root" / under SSL is the same as when
not under SSL, but that's something you might have to clear up with Support. Just for grins, you might try
action="https://secure.....nt/cgi-bin/nmspmt.pl" (and also
action="cgi-bin/nmspmt.pl") and see if it makes any difference. If it works then, it sounds like "root" is different under the two access methods!