External BEA Content Repository

Good day,
I am attempting to create a new BEA Repository that resides in an external database and have followed the instructions as described in Creating Additional BEA Repositories at http://e-docs.bea.com/wlp/docs81/repository/repository.html
After deploying the content_repo.jar and bouncing the WebLogic Portal Server, I am not able to view or edit repository content. It is also not possible to manage content types in the new repository.
Has anyone managed to create an external repository and published content to it satisfactorily?
The errors I get are of the following types:
1.) Error Retrieving Tree Operation.
EJB Exception: : com.bea.content.RepositoryRuntimeException: Error getting the folders files. Parent Id: {0} Type: {1} at com.bea.content.repo.internal.RepoNodeOpsBean.getNodeChildren(RepoNodeOpsBean.java:1228) at com.bea.content.repo.internal.RepoNodeOpsEJBRefImpl_57333u_ELOImpl.getNodeChildren(RepoNodeOpsEJBRefImpl_57333u_ELOImpl.java:776) at com.bea.content.spi.internal.NodeOpsImpl.getNodeChildren(NodeOpsImpl.java:285) at ... (400 lines trimmed off)
or:
2.) Defined Types for Repository: RefImplRepository An exception has been thrown while trying to render this page.
Exception Message:
Error getting types.; nested exception is: javax.ejb.TransactionRolledbackLocalException: EJB Exception: ; nested exception is: com.bea.content.RepositoryRuntimeException: While trying to look up comp/env/jdbc/contentDataSource in /app/ejb/content_repo.jar#RepoObjectClassReaderEJBRefImpl.... (500 lines trimmed off)
Thanks for your time.

Does it work in the admin tools when you click on the placeholder and preview it?
In the admin tools, do you have the primary property configured on your node's type? (to be the binary you want displayed)
Can you retrieve the content by hitting the ShowProperty servlet? (try a url like http://localhost:7001/<webappname>/ShowDoc/<path to your node>

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