Well, as already said in my _two_ previous mails:
Could you provide the output of the commands:
dpkg --status paparazzi-dev | grep 'Status\|Version'
dpkg --status libpcre-ocaml-dev | grep 'Status\|Version'
dpkg --status libocamlnet-ocaml-dev | grep 'Status\|Version'
dpkg --status libnetclient-ocaml-dev | grep 'Status\|Version'
dpkg --status libxml-light-ocaml-dev | grep 'Status\|Version'
Also you should really try to be a bit more specific and precise when describing your problems.
Which link for ivy-ocaml??
Which installation instructions did you follow?
(And not the installation from scratch as you maybe did?)