Add WWW via htaccess to vbulletin in folder?

My vbulletin is installed in /forum/

I've tried searching and testing different htaccess rules but couldn't get to redirect http://domain.com/forum/ to http://www.domain.com/forum/

Can anyone help? Or is there such feature in vbseo where I can turn it on?

Please check [How to] Setup www.yourdomain.com or yourdomain.com (www vs. non-www) - With .htaccess 301 redirects

The link that you posted does not work for my case. This is my case:

When a person visits http://raymond.cc/, they are redirected to http://www.raymond.cc/ and then automatically to http://www.raymond.cc/blog/

This is perfect but for forum it somehow doesn't work.

When a user visits http://raymond.cc/forum/, they are not redirected to http://www.raymond.cc/forum/

I have tried placing the two lines in .htaccess at the forum directory and it does not work.

RewriteCond %{HTTP_HOST} !^www.raymond.cc$ [NC]
RewriteRule ^(.*)$ http://www.raymond.cc/$1 [L,R=301]

You will need to include the folder name in folder names.

ie, in /forums

Code:

RewriteCond %{HTTP_HOST} !^www.raymond.cc$ [NC]
RewriteRule ^(.*)$ http://www.raymond.cc/forums/$1 [L,R=301]