Integration

I am walking through the SOA suite 11G R1 hands-on tutorial. I was able to get the initial chapters to work (deploying and running a composite with simple mediator and bpel components). However once I added the 'Human Interaction' task services and wanted to redeploy the composite, I get the following error:

oracle.webservices.provider.ProviderException: oracle.webservices.mdds.MddsException: java.io.IOException: oracle.mds.exception.MDSException: MDS-00054: The file to be loaded oramds:/deployed-composites/default/Project1_rev1.0/xsd/po.xsd does not exist.
at oracle.j2ee.ws.server.provider.ProviderConfigImpl.addService(ProviderConfigImpl.java:443)
at oracle.j2ee.ws.server.provider.ProviderConfigImpl.addService(ProviderConfigImpl.java:282)
at oracle.integration.platform.blocks.soap.FabricProviderConfig.addService(FabricProviderConfig.java:112)
at oracle.integration.platform.blocks.soap.FabricProviderConfig.addService(FabricProviderConfig.java:201)
at oracle.integration.platform.blocks.soap.WebServiceEntryBindingComponent.load(WebServiceEntryBindingComponent.java:157)
at oracle.integration.platform.blocks.soap.WebServiceEntryBindingComponent.load(WebServiceEntryBindingComponent.java:91)
at oracle.integration.platform.blocks.deploy.CompositeDeploymentConnection.deployServices(CompositeDeploymentConnection.java:161)
at oracle.integration.platform.blocks.deploy.CompositeDeploymentConnection.deploy(CompositeDeploymentConnection.java:92)
at oracle.integration.platform.blocks.deploy.CompositeDeploymentManagerImpl.initDeployment(CompositeDeploymentManagerImpl.java:144)
at oracle.integration.platform.blocks.deploy.CompositeDeploymentManagerImpl.load(CompositeDeploymentManagerImpl.java:62)


Initial analysis indicated issues with the metadata store. Any suggestions as to what may have gone wrong ?