Some servers will only run scripts named according to a certain convention. The part of the filename after the last dot (.) is called the extension.

.cgi is the standard for CGI programs, but in rare cases, servers will require you to name Perl scripts with a .pl extension.

If you decide to change the extensions of the program files, locate any files in the /exec/ directory with a .cgi extension. Rename these to .pl, then re-upload them. Be careful to remove the old files from your web server before uploading again. You will have to set the permissions on the files again.