need help on in_place_editor

Hey all,
I do a:
<% for c in @categories %>
<% @category = c %>
<%= in_place_editor_field :category, :name %>
<% end %>

but I keep getting the error:
Unknown action
No action responded to set_category_name

so I wrote a little function:
def set_category_name
@category = Category.find(params[:id])

but then I get
Template is missing

Missing template script/…/config/…/app/views/categories/set_category_name.rhtml

I’m probably missing something on hao to use the in place editor thing. How can I tell it to just update my category’s name?

I did put in_place_edit_for :name in my controller

thanx in advance