UWL Management

Hi

I have a problem. I create and register the system with the uwl. When I touch "register Item types for all system" I obtain the ERROR:

"System BACKEND1: Fri Nov 23 10:43:37 CET 2007

(Connector) :com.sap.netweaver.bc.uwl.connect.ConnectorException:Fri Nov 23 10:43:37 CET 2007

(Connector) :com.sapportals.connector.connection.ConnectionFailedException:Connection Failed: There was a problem to use JCO: java.lang.NoClassDefFoundError".

can you help me?

thanks.