You must register your tables using JDDI before you request them

Hey Guys....
I'm trying to query a custom table created on a SQL Server 2005 database, the same RDBMS for the SAP Web AS. I'm using a different database from the sytem's standard.
I created a Datasource for it. I can get the connection, but when I execute a query I get the following message.
Please note that I used everything SAP recommends for JDBC connector. I have done this previously for an oracle database but this time this approach (MS SQL) is not working...
I don't understand what it means for registering the tables using JDDI.
Could you please show me some light?
java.rmi.RemoteException: com.sap.engine.services.dbpool.exceptions.BaseRemoteException: SQL statement(s) cannot be executed over DataSource "ZPORTAL". If you are using an Open SQL DataSource, you must register your tables using JDDI before you request them. Reason: java.sql.SQLException: [NWMss][SQLServer JDBC Driver][SQLServer]Invalid object name 'BC_DDDBTABLERT'. [id = Unknown]
     at com.sap.engine.services.dbpool.deploy.DataSourceManagerImpl.executeFromAppThread(DataSourceManagerImpl.java:1201)
     at com.sap.engine.services.dbpool.deploy.DataSourceManagerImpl.executeInitStatements(DataSourceManagerImpl.java:532)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:324)
     at com.sap.pj.jmx.introspect.DefaultMBeanInvoker.invoke(DefaultMBeanInvoker.java:58)
     at com.sap.pj.jmx.mbeaninfo.AdditionalInfoProviderMBean.invoke(AdditionalInfoProviderMBean.java:289)
     at com.sap.pj.jmx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:944)
     at com.sap.pj.jmx.server.interceptor.MBeanServerWrapperInterceptor.invoke(MBeanServerWrapperInterceptor.java:288)
     at com.sap.engine.services.jmx.CompletionInterceptor.invoke(CompletionInterceptor.java:409)
     at com.sap.pj.jmx.server.interceptor.BasicMBeanServerInterceptor.invoke(BasicMBeanServerInterceptor.java:277)
     at com.sap.jmx.provider.ProviderInterceptor.invoke(ProviderInterceptor.java:258)
     at com.sap.engine.services.jmx.RedirectInterceptor.invoke(RedirectInterceptor.java:340)
     at com.sap.pj.jmx.server.interceptor.MBeanServerInterceptorChain.invoke(MBeanServerInterceptorChain.java:330)
     at com.sap.engine.services.jmx.MBeanServerSecurityWrapper.invoke(MBeanServerSecurityWrapper.java:287)
     at com.sap.engine.services.jmx.MBeanServerInvoker.invokeMbs(MBeanServerInvoker.java:131)
     at com.sap.engine.services.jmx.ClusterInterceptor.invokeMbs(ClusterInterceptor.java:212)
     at com.sap.engine.services.jmx.ClusterInterceptor.invoke(ClusterInterceptor.java:766)
     at com.sap.engine.services.jmx.MBeanServerInterceptorInvoker.invokeMbs(MBeanServerInterceptorInvoker.java:102)
     at com.sap.engine.services.jmx.connector.p4.P4ConnectorServerImpl.invokeMbs(P4ConnectorServerImpl.java:61)
     at com.sap.engine.services.jmx.connector.p4.P4ConnectorServerImplp4_Skel.dispatch(P4ConnectorServerImplp4_Skel.java:64)
     at com.sap.engine.services.rmi_p4.DispatchImpl._runInternal(DispatchImpl.java:319)
     at com.sap.engine.services.rmi_p4.DispatchImpl._run(DispatchImpl.java:200)
     at com.sap.engine.services.rmi_p4.server.P4SessionProcessor.request(P4SessionProcessor.java:136)
     at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:33)
     at com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java:41)
     at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
     at java.security.AccessController.doPrivileged(Native Method)
     at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:102)
     at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:172)
Caused by: java.sql.SQLException: [NWMss][SQLServer JDBC Driver][SQLServer]Invalid object name 'BC_DDDBTABLERT'.
     at com.sap.dictionary.database.catalog.XmlCatalogReader.getTable(XmlCatalogReader.java:98)
     at com.sap.sql.catalog.impl.BufferedCatalogReader.getTable(BufferedCatalogReader.java:126)
     at com.sap.sql.catalog.impl.BufferedCatalogReader.getTable(BufferedCatalogReader.java:89)
     at com.sap.sql.sqlparser.CheckColAndTabVisitor.checkTabs(CheckColAndTabVisitor.java:247)
     at com.sap.sql.sqlparser.CheckColAndTabVisitor.performCatalogChecks(CheckColAndTabVisitor.java:170)
     at com.sap.sql.sqlparser.CommonSQLStatement.checkSemantics(CommonSQLStatement.java:184)
     at com.sap.sql.jdbc.common.StatementAnalyzerImpl.check(StatementAnalyzerImpl.java:42)
     at com.sap.sql.jdbc.common.StatementAnalyzerImpl.preprepareStatement(StatementAnalyzerImpl.java:126)
     at com.sap.sql.jdbc.common.StatementAnalyzerImpl.preprepareStatement(StatementAnalyzerImpl.java:109)
     at com.sap.sql.jdbc.common.CommonStatementImpl.execute(CommonStatementImpl.java:217)
     at com.sap.engine.services.dbpool.wrappers.StatementWrapper.execute(StatementWrapper.java:167)
     at com.sap.engine.services.dbpool.deploy.DBInitializer.run(DBInitializer.java:69)
     ... 4 more

I changed the SQL Engine parameter to "Vendor SQL" under Additional tab of my datasource configuration

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