simple_form_for error: wrong number of arguments (3 for 2), in rails 3

I am getting wrong number of arguments (3 for 2) error for simple_form_for tag in rails 3 (with haml). Interestingly it was working fine some moment back.

= simple_form_for(:user,@user, :url => user_path, :remote => true, :html => { :id => "locate", :class=>"locateform" })开发者_Go百科 do |f

any pointers/help would be great.

Thanks

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This part looks suspicious.

:user,@user,

Did you acciddentally delete the :as => ? I think it should be

:user, :as => @user