Ruby On Rails : undefined local variable or method `end_form

I try this in Ruby On Rails (ROR) :

<%= form_remote_tag %>
<%= end_form_tag %>

But I have this error :

undefined local variable or method `end_form_tag' for #

I search a lot of time this Week-End (without) Internet.

First replace :

<%= end_form_tag %>

With :

<%= end %>

Because « end_form_tag » is deprecated. But after this correction I have this error :

compile error
/home/nico/testror/app/views/test/index.html.erb:1: syntax error, unexpected ')'

Add a do the the form tag:

<%= form_remote_tag do %>

And now there are:

compile error
/home/nico/testror/app/views/test/index.html.erb:2: syntax error, unexpected kEND

Transform this:

<%= form_remote_tag do %>
<%= end %>

To:

<% form_remote_tag do %>
<% end %>

The error come from the "=" char.