I cant figure out Webrat... Webrat::NotFoundError: Could not find fiel

Sorry for the stupid question but i cant find it anywhere why this isnt working for me and i am still a big newb with testing

This is my form:

<%= f.label :name, "Name" %>
<%= f.text_field :name %>

And i have this in my test:

test do
    visit new_message_path
    fill_in "Name", :with => "mokkol"
end

and i get this error:

Webrat::NotFoundError: Could not find field: "Name"

Somebody knows what to do?

I have webrat (0.5.3)
and Rails 2.3.4

Thanks!