Did you server meet the requirements? See http://ez.no/doc/ez_publish/technical_manual/4_0/installation/normal_installation/requirements_for_doing_a_normal_installation
It also needs DOM functions, not sure if that is causing your problem though but a quick thing to check.
Board member, eZ Publish Community Project Board - Member of the share.ez.no team - Key values: Openness and Innovation.