What OS are you running on? Are you using the jbpm installer and if so are you starting the demo with
ant start.demo (or ant start.demo.noeclipse) ?
If you look @ jbpm-installer/build.xml:
...
<property name="install.home" value="./" />
...
<target name="start.jboss7" depends="check.jboss.version" if="jboss.version.is.7">
....
<arg value="-Djbpm.console.directory=${install.home}/sample/evaluation/src/main/resources" />
....
</target>
do you have this /sample/evaluation/src/main/resources directory from the location where you are starting the demo?