I want to port a war file to JBoss 7.1. I deployed the existing war file, but got an exception:

Caused by: java.lang.NoClassDefFoundError: org/hibernate/ejb/EntityManagerImpl

at com.hp.dtag.pmo.SchemaCreator.setEm(SchemaCreator.java:71)

at com.hp.dtag.pmo.portlet.dummy.InitializeDummyData.init(InitializeDummyData.java:50)

The code in SchemaCreator is as follows:

public void setEm(EntityManager em){

        if (em.getDelegate() instanceof Session) {

            s = (Session)em.getDelegate();

        }

        if (em.getDelegate() instanceof EntityManagerImpl){

            s = ((EntityManagerImpl)em.getDelegate()).getSession();

        }

    }

I have the dependency to the hibernate entitymanager in the pom:

        <dependency>

            <groupId>org.hibernate</groupId>

            <artifactId>hibernate-entitymanager</artifactId>

            <scope>provided</scope>

        </dependency>

Why doesn't JBoss find the EntityManagerImpl?