Unable to get Environment Connection in My webmethods server

Hi All ,iam facing so many time this error…and creating more problems for me…
Iam creating new MWS server instance in with name “raja1”.it created properly.
when i configuring Environment in MWS first time(Administrator–>system settings–>databasepool configuration---->addpool) iam geting Error like

Failed to evaluate binding expression: “#{PoolConfigViewPage.tableContent}”




Unexpected exception caught: com.webmethods.ccs.engine.model.RepositoryException: Error retrieving JDBC pool configurations




Failed to evaluate binding expression: “#{PoolConfigViewPage.tableContent}”

any one help me ple…