Can't get link_to_unless_current to work

Can't get link_to_unless_current to work

After someone pointed link_to_unless_current out to me, I would like to
apply it to my dashboard sidebar. However, I can't get it to work, so I'm
guessing I'm doing something wrong.
This is my current sidebar
.dashboard_bar
%ul
= link_to admin_dashboard_path do
%li.icon-dashboard
= link_to admin_cs_dashboard_path do
%li.icon-heart
= link_to admin_dashboard_path do
%li.icon-money
= link_to admin_dashboard_path do
%li.icon-group
= link_to admin_dashboard_path do
%li.icon-bug
= link_to admin_dashboard_path do
%li.icon-hdd
When I change link_to to link_to_unless_current, it just screws up my css
and the icons are no longer clickable.
Can someone enlighten me on how to fix it?