.htacess code breaking mybb Search engine friendly urls

[i-Discover]

Hi, i wanted to set my forum to auto redirect from /forum to forum.mysite.com

But when i put the .htacess code below, it breaks mybb search engine url friendly and i get 404 error. Could you please help solve this issue? Thanks

# redirect /forum to forum.
Options +FollowSymLinks
RewriteEngine on
RewriteRule (.*) http://forum.mysite.com/$1 [R=301,L]

[dthiago]

Use your cPanel.There´s a redirect http://www.mysite.com/forum to http://forum.mysite.com/ and your mybb need to be installed on http://forum.mysite.com/

[i-Discover]

Hi, found this solution http://stackoverflow.com/questions/15712...-subdomain
Everything is working fine now. Thanks anyway

# redirect /forum to forum.
RewriteRule ^(forum/.*)$ http://forum.mysite.com/$1 [R=301,L,NC]