runeguide domain name (CNAME)

I have purchased a new domain name from 123reg.com and i want to connect to my forum i followed someone guide on these support forums.
These are the settings i entered in the DNS MANAGEMENT on 123reg.


And i went to my from admin panel and went Admin CP >> General >> Forum Address >>> Personalized domain name

and i typed in

and i got this error message


even tho i followed the guide and typed in the information
can anyone help and give me advice plz

thank you
ash (runeguide)

PLZ HELP ITS URGENT

Please don't double post unless it’s been 24 hours from your last post.

My guess you need to add the www after the http://

tried that it wont work cuz the name has got to be www.

ps. sorry about the double post i kinda forgot