ferret not working after upgrade

After a recent upgrade to a newer ferret version and acts_as_ferret plugin, searching is not working any more.

I have changed find_by_contents to find_with_ferret, but it still doesnt work. :frowning:

user.rb acts_as_ferret({:fields => ['username', 'lastname', 'town'})

search form.rhtml <% form_tag({ :action => "search" }, :method => "get") do %>     <%= text_field_tag "q", params[:q] %>     <%= submit_tag "Search" %> <% end %>

controller: def search     if params[:q]   @users = User.find_with_ferret(params[:q])     end end

Any help would be most welcome. Thank you.