Error, wp-admin/includes/plugin-install.php on line 77

Hi,

I have a site set up on the root of cPanel which is all fine. I then added another site via add AddOn Domains and created a WP site for it using the one click install.

Every thing on the new site works accept it cannot pick up on the RSS feed correctly as it gives as HTTP error and I cannot search for plugins to add them.

I get the following error,
Warning: An unexpected error occurred. Something may be wrong with www.ads-software.com or this server’s configuration. If you continue to have problems, please try the support forums. (WordPress could not establish a secure connection to www.ads-software.com. Please contact your server administrator.) in /home2/mysite/public_html/mysite/2/wp-admin/includes/plugin-install.php on line 77

This is a fresh install of WP. Nothing is on it yet.