Comment 5 for bug 597090

/usr/bin/compiz (core) - Fatal: Software rendering detected.
/usr/bin/compiz (core) - Error: Failed to manage screen: 0
/usr/bin/compiz (core) - Fatal: No manageable screens found on display localhost:11.0

is your error, try the following on the server:

sudo gconftool-2 --direct --config-source xml:readwrite:/etc/gconf/gconf.xml.mandatory --type string --set /desktop/gnome/session/required_components/windowmanager metacity

(thats one line)