You link does not seem to be a DNN link... are you using asp instead of aspx and it was just a mistake?
Also.... are you using friendly URLs?
Please try the following. go to a page from your site other than homepage (Just to test)
Modify the URL from your browser address field and change http:// to https:// manually
Press enter
Is your page loaded?
Note: It must work for friendly or non friendly URLs.