Invalid Forum Redirect

[TehForum]

I'm getting an error when I log onto my forum, it says

Invalid Forum Redirect
(http://www.domainname.org)

That's when I access the website without the 'www' part, but it works fine when I access with 'www', so how do I fix it?

[Lynne]

You should use an .htaccess file to redirect all your www traffic to the non-www url (or vice-versa, whichever you decide to use).

[TehForum]

I sorted it out in the Admin CP, thank you anwyays.

[SPEEDKILLZ]

I sorted it out in the Admin CP, thank you anwyays.

same problem here- can you tell what you did to fix? thanks