error WCF:More than one endpoint configuration for that contract was found

Hello All,
i got this error...."An endpoint configuration section for contract 'ServiceReference1.IService1' could not be loaded because more than one endpoint configuration for that contract was found. Please indicate the preferred endpoint configuration section by name."

I am using VSS for my project. i have 2 project in my solution.1 is WCF and another is Silverlight.and i am adding WCF service reference to the silverlight project. now i replicated same solution as new project on VSS and got this error for it.....

Is anybody gone through this problem? help me.

Thank You.
Pravin