Something like this could be a timeout, or error connecting back to the Core Server. Make sure you have an IP address and can contact the Core Server. Can it contact it by hostname? FQDN? IP address? If one (or more) of those doesn't work, it could be trying to contact the Core with a name that isn't resolving.
Another option could be that the web service isn't running on the Core Server. Check and make sure IIS is running and that the Provisioning Web service is running. It's at http://CORESERVER/landesk/managementsuite/core/ProvisioningWebService/WebService.asmx