hi i also face same issue with u,i m using jbpm-5.3.0.Final-installer-full.zip,
i look throught the ant script, the standalone.bat cant spawn out, so the only solution is manually run the standalone.bat in jboss7.0.2.
We have to manually run ant script 1 by 1 which is
1) ant start.h2
2) Manually go invoke \User\jbpm-installer-5.4\jboss-as-7.1.1.Final\bin\standalone.bat
3) ant start.eclipse
4) ant start.human.task