Certificate Error when enabling SSL

[Ridgewood12]

Hi All,
I Have come across a problem with SSL that I can't figure out.

When I enable SSL through Site Options. I recieve an error when attempting to Checkout on the website.
The error is "There is A problem with this Websites Security Certificate
The Security Certificate presented by this website was issued by a different website address.

Security certificate problems may indicate an attempt to fool you or intercept any data you send to the server.

I have attached a snapshot of the error.

i have contacted my hosting company (Fasthosts) and they have told me this is nothing to do with them.
I've checked and it does seem to relate to the site because when I remove SSL the cart works fine.

I'm currently running Version 9.0.5.0.0.0

Any ideas anyone

Thanks

[grantglendinnin]

Fasthosts said it's nothing to do with them...typical

Probably a non-www v www issue

Check your network settings and business settings to ensure your site is listed as http://www.domain.com and not variations of http://www.domain... and http://domain....

If you can post a URL to the site somebody should be able to pinpoint the exact cause and give a solution.

[Ridgewood12]

The Network settings and Business setings all look good. No obvious isses. The website is stil in pilot, so not much content. if someone could take A look it would be much appreciated.

Website Address.
www.true-survival.co.uk

Thanks