redirect controller

Hi all i install the codeigniter on subfolder .. like
http://www.site.com/subfolder
its load my the main controller good (its login page).
after i do the login good the redirect try now from the main domain and not from the subfolder..

Code:

RewriteEngine On
# Please do-not forget to change RewriteBase /cms
RewriteBase /cms

RewriteRule ^$ /cms/index.php [L]
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond $1 !^(index\.php|robots\.txt|favicon\.ico)

RewriteRule ^(.*)$ /cms/index.php?/$1 [L]
</IfModule>

after i try to login this redirect me to http://www.site.com/contrroler
and its need to be http://www.site.com/cms/contrroler

but the main page load good http://www.site.com/cms/
also i did base_url in config