Odd external link behavior

I am trying to create a button to link to an external page so that renters can view streaming video from an onsite camera. If I enter create a button, or link text to www.mysticrental.com:8000, After publishing all I get is “There is no application set to open the URL www.mysticrentalview.com:8000”. So I tried something really simple as a link i.e. www.google.com and now clicking the text or button gives “The requested URL /page-4/www.google.com was not found on this server.” Restarted safari, cleared history. No luck. It seems like I must be missing something really easy.