Rails - Oct 2010 - Ajax call-request.xhr? = false Rails 3

I have the following tag in a view:-

   <%= form_tag url_for({:controller => params[:area], :action
=> :search, :area => params[:area] }), :method => :get, :remote =>
true do %>
    <%= label_tag(:query, "Search for:") %>
     <%= text_field_tag("query", params[:query], :autocomplete
=>
"off", :onKeyPress=>"return disableEnterKey(event)")
%>
        <%= submit_tag("Search", :name => nil, ) %>

On reaching the controller in question request.xhr? is = to false

Anyone has any ideas why? or what am I doing wrong.

I have prototype.js and rails.js files loaded in my layout files.

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