Postgresql and J2ee

dear support,

I would like to use two PostgreSql 7.3 XA Databases rather than
XACloudscape with my j2ee application but when I deploy it on the
server, this one throws the following exception :

* java.lang.ClassCastException
at
com.sun.enterprise.resource.SystemJdbc20XaAllocator.createResource(SystemJdbc20XaAllocator.java:39)
at
com.sun.enterprise.resource.PoolManagerImpl.getResourceFromPool(PoolManagerImpl.java:177)
at
com.sun.enterprise.resource.SystemJdbcDataSource.internalGetConnection(SystemJdbcDataSource.java:72)
at
com.sun.enterprise.resource.SystemJdbcDataSource.getConnection(SystemJdbcDataSource.java:50)
at
com.sun.ejb.persistence.PersistenceManagerImpl.getConnection(PersistenceManagerImpl.java:588)
at
com.sun.ejb.persistence.PersistenceManagerImpl.getConnection(PersistenceManagerImpl.java:573)
at
com.sun.ejb.persistence.PMDeployerImpl.createTable(PMDeployerImpl.java:201)
at
com.sun.ejb.persistence.PMDeployerImpl.ejbJarDeployed(PMDeployerImpl.java:68)
at
com.sun.enterprise.tools.deployment.backend.JarManagerImpl.loadJar(JarManagerImpl.java:141)
at
com.sun.enterprise.tools.deployment.backend.JarInstallerImpl.deployEjbs(JarInstallerImpl.java:727)
at
com.sun.enterprise.tools.deployment.backend.JarInstallerImpl.deployApplication(JarInstallerImpl.java:221)
at
org.omg.stub.com.sun.enterprise.tools.deployment.backend._JarInstallerImpl_Tie._invoke(Unknown
Source)
at
com.sun.corba.ee.internal.corba.ServerDelegate.dispatch(ServerDelegate.java:355)
at com.sun.corba.ee.internal.iiop.ORB.process(ORB.java:255)
at
com.sun.corba.ee.internal.iiop.RequestProcessor.process(RequestProcessor.java:84)
at
com.sun.corba.ee.internal.orbutil.ThreadPool$PooledThread.run(ThreadPool.java:99)*

* I use j2ee 1.3 with j2sdk 1.4 .1*

the features on my linux system are :

in .bash_profile *export
CLASSPATH=.:$JAVA_HOME/lib/j2ee.jar:/usr/share/pgsql/pg73jdbc3.jar*

in $J2EE_HOME/bin/userconfig.sh export
*J2EE_CLASSPATH=/usr/share/pgsql/pg73jdbc3.jar*

in $J2EE_HOME/bin/cloudscape file I change
*COM.cloudscape.core.JDBCDriver* by *org.postgresql.Driver* for setting
the good class in DriverManager

then I launch the following command

*./j2eeadmin -addJdbcXADatasource jdbc/name
org.postgresql.jdbc3.Jdbc3ConnectionPool -props serverName=myServer
portNumber=5432 databaseName=nameDB user=myPostgresqlUser
*
when I start the server I haven't any problems but after .....

Do you know if I can use this driver and how I must declare my databases

Thank you in advance

phMayre