ssl install error when i add the ssl cert

Hello, I sell alot of comodo ssl certs thru my web hosting company but i have another website that iam adding your cert thru. So far it wont install right and i get a 505 unsecured error when i turn it on, what would cause this? http://www.dailyhosting.net is the website i own and site the ssl will go on. Thank you for your input and feedback , Oulman