Rails - Apr 2007 - sortable_element - No HTML output

I''ve been trying to implement a sortable list and have been following
the Rails Cookbook I''ve just bought. My code is exactly the same as the
one in the book, but when I tried to move an element, I can only select
the element. I then looked at the HTML source and there is no javascript
being inserted into the page. The source in my view page looks like
this:

<%= sortable_element(''list'',
    :update => ''order'',
    :complete => visual_effect(:highlight, ''list''),
    :url => { :action => "order" }) %>

I''ve got the references to the javascript libraries in the layout page,
but this shouldn''t affect Rails writing javascript to the page. Is
there
something I''m overlooking?

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Ok. I''ve managed to figure out that something about the environment is 
causing the problem. I''ve put exactly the same code in another Rails 
project and it does correctly generate the javascript in the html 
output.

Anyone know a solution?

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