-<%= form_for(form.item) do |f| %>
+<%= fields_for(form.field_name, form.item) do |sf| %>
<%= render 'system/error_explanation', :obj => form.item %>
- <%= render form.fields_template_name, :form => form, :f => f %>
+ <%= render form.fields_template_name, :form => form %>
<% end %>