Dont worry about the double post, i think it was because we have to approve new members posts and so you couldnt see them ;o) And dont worry about us we cant to keep the board clean.
Do you have a controller /application/talentmena.php in your directory. your ci files must be direct in your homedirectory for e.g.
/var/www/html <-- if this ist the path to localhost
/var/www/html/index.php
/var/www/html/...
/var/www/html/application/...
/var/www/html/system/...
Do you have a .htaccess file in you root?
/var/www/html