I´m using Hibernate tools 3.2.4B1

When try to create a reveng.xml (Hibernate reverse engineering file)
i get the error:

org.hibernate.console.HibernateConsoleRuntimeException: Persistence unit not found: 'pmanager'.
at org.hibernate.console.ConsoleConfiguration.buildJPAConfiguration(ConsoleConfiguration.java:144)
at org.hibernate.console.ConsoleConfiguration.buildConfiguration(ConsoleConfiguration.java:537)
at org.hibernate.console.ConsoleConfiguration.access$0(ConsoleConfiguration.java:522)
at org.hibernate.console.ConsoleConfiguration$2.execute(ConsoleConfiguration.java:218)
...

i have created a persistence.xml file, but it seems, that the reveng Wizard can´t find the file ? Where do i have to place the persistence.xml file.

a little bit best practice would be nice