Microsoft Silverlight 2.0 Beta 2 – InvalidOperationException occurred

Private WithEvents mylogonService As NewsrLogon.IwcfLogonServiceClient

Error:

Could not find default endpoint element that references contract
‘SilverlightApplication.srLogon.IwcfLogonService’ in the ServiceModel
client configuration section. This might be because no configuration file was
found for your application, or because no endpoint element matching … Read the rest