Members replying to registration Emails get 404 error
 

Just set up new site.

Folks registering are receiving their verification Email, but when they click the link, they get Error 404 - URL not found.

Now, the link contains the path www.domainname/forums/ and my Domain contains that destination.

If I remove /forums from my Domain destination, registration will work OK, but then my normal domain name can't find the site! - it can't see index.html

I'm going in circles......What do do??:(