help on Allegroserve

Hello, could you help me on this problem :
I am using AllegroServe on my PC which part of a LAN.
I have published a computed page, function #'chronologie

(publish :path "/chronologie" :content-type "text/html" :function #'chronologie)

- From my PC it works fine : http://GROSBIDE/chronologie (GROSBIDE is the host name of my Windows machine)
- From an external PC it works fine too  http://80.14.112.190/chronologie (Where 80.14.112.190 is the temporary IP address given to my router by my ISP)
I have registered a domain name orta.no-ip.info which redirects to 80.14.112.190 but 
http://orta.no-ip.info/chronologie doest not work => "404 not found, the requested URL was not found on this server."
When I ping http://orta.no-ip.info my machine is known 
If I indicate an host in the publish function :
(publish :path "/chronologie" :content-type "text/html" :function #'chronologie
             :host "orta.no-ip.info"
           )
it does not work.
Any idea to help me ?
Regards
Jacques RATTIER France Telecom. France.