Why am I getting a 403 Forbidden Error?
A 403 Forbidden error occurs when the web server finds itself with insufficient permissions to run your script.
Make sure you have given the script proper permissions. In SSH, this is accomplished with:
chmod 755 scriptname.cgi
If you are uploading via FTP, your FTP client probably has some facility for setting file permissions. You want to make sure that all choices (user, group, and other) have execute permission.