123 Reg Domian

I have set up a forum using forumotion, but im having problems changing the domain from website.forumotion.co.uk to the domain name i have bought through 123 Reg.
Im getting the error:

The supplied domain name is not well configured
You have no CNAME redirecting to : quarter-mile.forumotion.co.uk

I have set up the website forwarding to www.quarter-mile.co.uk but still nothing.
Can anyone help with this please.

thanks in advance.

Please take a look at this topic.

@MrMario wrote:Please take a look at this topic.

I think you were meant to post this link as well: http://help.forumotion.com/t7021-redirect-an-extern-domain-name-that-you-own-to-your-board

I have tried this, and firstly the 123 reg panel doesnt look at all like this, like it has no simple section to insert the URL. And secondly i have tried all variations of the CNAME etc and then web address forwarding....

Can anyone explain how i should have my current forumotion url
quarter-mile.forumotion.co.uk to Quarter-Mile.co.uk

Thanks.