New to JDeveloper, having problems with EJB tutorial.

Hi,
I'm new to the world of JDeveloper, I'm trying to follow this tutorial
http://st-curriculum.oracle.com/obe/jdev/obe11jdev/ps1/ejb/ejb.html
Firstly when I create an entity from a table I get the following error;
Starting Offline Database Synchronization
Generating classes for Entity CbsdSecurity...
Entity generation for CbsdSecurity failed.
I'm not really sure why this is, however I suspect this is at the heart of the problems.
If I continue I can get to the point where I create a EJB Diagram, however when I try to drag my autogenerated class onto the diagram I get the following error;
"Entity does not belong to Persistence Unit xxxxEJB which is associcated with Diagram EJB3.ejb_diagram"
In addition the log at the bottom has the following warnings.
23-Sep-2010 10:07:46 oracle.security.jps.internal.credstore.ssp.CsfWalletManager openWallet
WARNING: Opening of wallet based credential store failed. Reason java.io.IOException: PKI-02002: Unable to open the wallet. Check password.
23-Sep-2010 10:07:53 oracle.adf.share.jndi.ReferenceStoreHelper getReferencesMapEx
WARNING: Incomplete connection reference object for connection:fcs2ukd
Now my database connection doesn't seem to remember the password even though I have ticked the 'remember password' tick box.
I am developing under Windows XP using JDK1.6.0.21
If anyone could point out what I'm going wrong I would be very grateful.
Thanks
Rich
Edited by: Rich Carless on Sep 23, 2010 9:32 AM

Try to test Your DB connection in JDeveloper. Is it success?
Best regards, Debuger!

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