Jboss migration 4.3 to 5.1 : ORA-01017: invalid username/password; logon denied

We are in the Process of migrating jboss 4.3 to jBoss 5.1 We are using EJB 1.1 in the current systems.We fixed a lot of issues to make the server up and finally we are not able to see the Home Page due to Db connection.We are getting Below error:

[org.hibernate.connection.DatasourceConnectionProvider] (main) Using datasource: java:/oradbds
2012-10-11 18:27:59,493 WARN [org.jboss.resource.connectionmanager.JBossManagedConnectionPool] (main) Throwable while attempting to get a new connection: null
org.jboss.resource.JBossResourceException: Could not create connection; - nested throwable: (java.sql.SQLException: ORA-01017: invalid username/password; logon denied
)
at org.jboss.resource.adapter.jdbc.local.LocalManagedConnectionFactory.getLocalManagedConnection(LocalManagedConnectionFactory.java:225)
at org.jboss.resource.adapter.jdbc.local.LocalManagedConnectionFactory.createManagedConnection(LocalManagedConnectionFactory.java:195)
at org.jboss.resource.connectionmanager.InternalManagedConnectionPool.createConnectionEventListener(InternalManagedConnectionPool.java:639).

I Guess error may be due to Db connection related Jar like ojdbc14.jar which is incompatible for jboss5.1.
Let me know if you need some more info .please provide a solution.