Problem with the compilation

Hello!

        I have a problem with the file's compilation. I compile with the 
LispWork of Harlequín. The file is:

(defmethod write-first-page ((url url:http-url) stream)
              (http:with-conditional-get-response (stream :html)
                             (html2:with-html-document (:stream stream)
                                        (html:with-standard-document-body 
(:stream stream)
                                                   (write-string "Hola" 
stream)
                                          )
                             )
                )
)
(http:export-url 
"http://umbriel.lcc.uma.es:8000/cl-http/siidepe/pagina.html"
                  :computed
                  :response-function #'write-first-page)

        And when i compile it says:  No package named "URL", and the rest of 
the packages. I don't know why it doesn't find the packages. I have tried 
it, too without the name of the packages, but i haven't got anything.

        I don't know if have to write something more in the file, or what to 
do, for the compiler finds the packages that are defined in the cl-http.

Thanks very much.    Cristina

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