[Pharo-project] Running Pharo on a headless Ubuntu server

Hello, I am trying to run a Pharo Seaside image on an Ubunbtu 10.04 server. When I start the image like this squeak -mmap 256m -vm-sound-null -vm-display-null seaside3.0rc.image I get the following errors: found gettext in path /srv/seaside libasound.so.2: cannot open shared object file: No such file or directory squeak: could not find any display driver /usr/bin/squeak: line 277: 7499 Aborted $VM "$1" "$2" Does anybody know the minimal set of packages I need to install before I can run a headless image? Jan.