You need to set file permissions for static HTML pages to at least "604" using the "chmod" command. This authorizes the web server to read the file. Executable programs, such as Perl scripts, require at least "705".
You can change the permissions using your FTP program (for example, Filezilla) or using the konsoleH WebFTP (after logging in, go to "Manage Services; Extras; WebFTP").
