Can you confirm the existance of this file : '/var/www/cgi-bin/report.cgi'
and its file rights ( chmod wise )
Seems to me that there is a problem with this specific file for some reason ...
regarding the port stuff ... ports dont really matter as far as i know, so thats fine.
Can you give me the url on which ur running this site ( and maybe link to the page that gives u the error ? )