persistence provider not found

hi,

I use IntelliJ IDEA 10.5 Ultimate. I'm trying to persist using JPA with EclipseLink as persistence provider.
When I run my main class I get the following error:

Exception in thread "main" javax.persistence.PersistenceException: No Persistence provider for EntityManager named chapter02PU
     at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:84)
     at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:54)
     at com.apress.javaee6.chapter02.Main.main(Main.java:20)
...

I have enabled JPA support according to the IntelliJ help.

persistence.xml:

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence" version="2.0">
    <persistence-unit name="chapter02PU" transaction-type="RESOURCE_LOCAL">
        <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
        <class>com.apress.javaee6.chapter02.Book</class>
        <properties>
            <property name="eclipselink.target-database" value="DERBY"/>
            <property name="eclipselink.jdbc.driver" value="org.apache.derby.jdbc.ClientDriver"/>
            <property name="eclipselink.jdbc.url" value="jdbc:derby://localhost:1527/chapter02DB;create=true"/>
            <property name="eclipselink.jdbc.user" value="APP"/>
            <property name="eclipselink.jdbc.password" value="APP"/>
            <property name="eclipselink.ddl-generation" value="create-tables"/>
            <property name="eclipselink.logging.level" value="INFO"/>
        </properties>
    </persistence-unit>
</persistence>

My facet configuration:

<component name="FacetManager">
    <facet type="jpa" name="JPA">
      <configuration>
        <setting name="validation-enabled" value="true" />
        <setting name="provider-name" value="EclipseLink" />
        <datasource-mapping>
          <factory-entry name="chapter02PU" />
        </datasource-mapping>
        <deploymentDescriptor name="persistence.xml" url="file://$MODULE_DIR$/META-INF/persistence.xml" />
      </configuration>
    </facet>
  </component>

My project is a Maven module and I've configured my pom.xml to download the (in my opinion necessary) jar files:

javax.persistence (1.1.0),
eclipselink (1.1.0)
derbyclient (10.4.2.0)
derby (10.4.2.0)

The corresponding jar files are now listed as external libraries.

However IntelliJ's JPA support still complained about a missing javax.persistence jar, so I clicked "fix" and now have a javax.persistence.jar in the "lib" folder of the project, too.

The line, IntelliJ is referring to (in the error infos) is:

EntityManagerFactory emf = Persistence.createEntityManagerFactory("chapter02PU");


I've found a thread in this forum adressing the same problem (http://devnet.jetbrains.net/message/5302381#5302381).
That thread's founder said he had to add some jars to the application server library. However I don't know whether this should
also help me, as I think I let Maven import all necessary jars.

I really have no more idea how to fix this problem.