ernteSKY

I can't install the Revive AdServer... I used few time this script before and never got this error... I really don't know where to find a solutions for that... I got this error: Forbidden You don't have permission to access /www/admin/install.php on this server. File permissions are set to 644 and 755. I already tried with 666 and 777 but no luck... Can somebody help me out with few good idea?