Problems import org.hibernate.exception.ConstraintViolationException when I use Jboss7

[teresam]

I have a web application running over Jboss 6 and it is working fine, but the same application over Jboss 7 and Eclipse Juno, on compilation time the

"import org.hibernate.exception.ConstraintViolationException" gives me the following “The import org.hibernate.exception cannot be resolved”, ¿any suggestions?.

Thanks in advanced