[Pharo-project] What am I doing wrong?

Hi Folks: I'm trying run a pharo images un a Server Ubuntu Distributor ID: Ubuntu Description: Ubuntu 8.04.4 LTS Release: 8.04 Codename: hardy but when running get this message: diogenes@infantil:~/www$ sudo squeak -headless Pharo-1.0.image SQUEAK_ENCODING='UTF-8' SQUEAK_PATHENC='UTF-8' SQUEAK_PLUGINS='/usr/local/lib/squeak/4.0.3-2202' + exec /usr/local/lib/squeak/4.0.3-2202/squeakvm -headless Pharo-1.0.image libSM.so.6: cannot open shared object file: No such file or directory could not find module vm-display-X11 Aborted Thank in advance..