Redmine

hi
i have a fresh new redmine install (redmine 1.3)
i would like to connect it to my collabnet subversion install (version subversion 1.8.1)

when i go to settings/repositories/ subversion is not green marked
i change the path of scm_subversion_command: /home/cedric/csvn/svn in
configuration.yml

do i need to modify something else ? thanks