prolog server on linux

Hi there,

Can anybody help me with the following problem?

We have a linux server, and we want to run our prolog server as a service.
We would like to use upstart, the script now looks like this in
/etc/init/myserver.conf:

script
  exec sudo -u user "/home/user/myserver"
end script

and in myserver(prolog program saved by 'qsave_program')  we start the http
server automaticaly with :

http_server(http_dispatch, [port(8000)]).

But when typing

sudo service myserver start

I can see that the myserver started, but immediately receives a halt, and
exits according to the log '/var/log/upstart/myserver.log'.

Any idea what is wrong with the above?

regards,
Gabor
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