I have a problem deploying a rar for Jpox into Jboss4.0.1 default server on Windows XP, JDK 1.5.

I read the faq and have been looking around the net for an answer but with no solution. So any help will be appreciated! Here are the details

The error I receive

MBEANS THAT ARE THE ROOT CAUSE OF THE PROBLEM:
ObjectName: jboss.jca:service=ManagedConnectionFactory,name=jpox
 state: FAILED
 I Depend On: jboss.jca:service=RARDeployment,name='jpox-1.0.4.rar'

 Depends On Me: jboss.jca:service=ManagedConnectionPool,name=jpox
org.jboss.deployment.DeploymentException: couldn't get oldRarDeployment! jboss.jca:service=RARDeployment,name='jpox-1.0.4.rar'; - nested throwable:
(org.jboss.deployment.DeploymentException: ConnectionDefinition
'org.jpox.resource.PersistenceManagerFactoryImpl' not found in rar
'jpox-1.0.4.rar')

In jpox-1.0.4.rar the directory structure is as following

jpox-1.0.4.rar
|- META-INF
| |- ra.xml
|- javax (containing the jdo api)
|- org/jpox/.. (containing the jpox stuff)
|-resource (containing the above mentioned class)

The ra.xml is as follows:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE connector PUBLIC "-//Sun Microsystems, Inc.//DTD Connector 1.0//EN" "http://java.sun.com/dtd/connector_1_0.dtd">
<connector>
 <display-name>JPOX Connector</display-name>
 <description></description>
 <vendor-name>JPOX Team</vendor-name>
 <spec-version>1.0</spec-version>
 <eis-type>JDO Adaptor</eis-type>
 <version>1.0</version>

 <resourceadapter>
 <managedconnectionfactory-class>org.jpox.resource.ManagedConnectionFactoryImpl</managedconnectionfactory-class>
 <connectionfactory-interface>javax.resource.cci.ConnectionFactory</connectionfactory-interface>
 <connectionfactory-impl-class>org.jpox.resource.PersistenceManagerFactoryImpl</connectionfactory-impl-class>
 <connection-interface>javax.resource.cci.Connection</connection-interface>
 <connection-impl-class>org.jpox.resource.PersistenceManagerImpl</connection-impl-class>
 <transaction-support>LocalTransaction</transaction-support>

 <!-- Please Add your properties here -->
 <config-property>
 <config-property-name>ConnectionURL</config-property-name>
 <config-property-type>java.lang.String</config-property-type>
 <config-property-value>jdbc:mysql//localhost/test</config-property-value>
 </config-property>
 <config-property>
 <config-property-name>ConnectionDriverName</config-property-name>
 <config-property-type>java.lang.String</config-property-type>
 <config-property-value>com.mysql.jdbc.Driver</config-property-value>
 </config-property>
 <config-property>
 <config-property-name>ConnectionUserName</config-property-name>
 <config-property-type>java.lang.String</config-property-type>
 <config-property-value>jboss</config-property-value>
 </config-property>
 <config-property>
 <config-property-name>ConnectionPassword</config-property-name>
 <config-property-type>java.lang.String</config-property-type>
 <config-property-value>xxxx</config-property-value>
 </config-property>
 <config-property>
 <config-property-name>AutoCreateSchema</config-property-name>
 <config-property-type>boolean</config-property-type>
 <config-property-value>true</config-property-value>
 </config-property>

 <authentication-mechanism>
 <authentication-mechanism-type>BasicPassword</authentication-mechanism-type>
 <credential-interface>javax.resource.security.PasswordCredential</credential-interface>
 </authentication-mechanism>

 <reauthentication-support>false</reauthentication-support>
 </resourceadapter>
</connector>

and the jpox-ds.xml :

<?xml version="1.0" encoding="UTF-8"?>
<connection-factories>
 <tx-connection-factory>
 <jndi-name>jpox</jndi-name>
 <rar-name>jpox-1.0.4.rar</rar-name>
 <connection-definition>org.jpox.resource.PersistenceManagerFactoryImpl</connection-definition>
 <!--adapter-display-name>JPOX Connector</adapter-display-name-->
 <config-property name="ConnectionDriverName"
 type="java.lang.String">com.mysql.jdbc.Driver</config-property>
 <config-property name="ConnectionURL"
 type="java.lang.String">jdbc:mysql://localhost/test</config-property>
 <config-property name="UserName"
 type="java.lang.String">jboss</config-property>
 <config-property name="Password"
 type="java.lang.String">xxxx</config-property>
 <config-property name="AutoCreateSchema"
 type="boolean">true</config-property>
 </tx-connection-factory>
</connection-factories>

I'm not quite sure if I have the correct class for the connection definition but I tried a couple of other classes with the same result. I also tried to unpack the rar into a directory with the same result.
It seems that the classloader is not able to pick up the jars inside the rar. or I am missing something.
Thanks in advanced.
Stefan