Error 104: Connection was reset

Hi All,

When visitors initially load my site, a lot of the time the page will reset itself, with the error 104 (connection was reset) page flashing up at first, before the site refreshes itself and loads correctly.
I think this could be having a negative effect on my SEO and I want to know why it is happening and how to stop it from happening.
I would appreciate any help or advice that anyone may have.

Kind regards,

The page I need help with: [log in to see the link]