Ajax.InPlaceEditor & REST

I cannot for the life of me get this to work:
<% @ranks.each do |rank| %>
          <tr>
               <th><%= rank.number %></th>
               <td><span id="edit_#{rank.rank}"><%= rank.rank %></

</td>

               <%= javascript_tag "new
Ajax.InPlaceEditor('edit_#{rank.rank}',
'#{rank_url(rank)}', {ajaxOptions:{method:'put'}});" %>

               <td><%= link_to 'X', rank_path(rank), :confirm => 'Are
you
sure?', :method => :delete %></td>
         </tr>
<% end %>

I don't see what is causing the problem. I click on the text and
nothing happens. Any suggestions? (I have the javascript_tag included
in the head section.)

Anyone else having problems with Ajax.InPlaceEditor & REST?