If you see a screen when logging into your control panel with an error message headed "Secure Connection Failed" or "Certificate Error" then you need to do the following, depending on your browser.
FireFox
Click Or you can add an exception
Add Exception Certificate
Confirm Security Exception
The page will continue to load.
Internet Explorer 7
Click Continue to this website (not recommended)
The page will continue to load but with a red address bar along the top.