I am afraid that this error is not connected with our components in any way. This is a pure WCF RIA Services error and the WCF RIA Services stack is not part of RadControls for Silverlight. It is developed and supported by Microsoft.
The error you are getting can be caused by virtually anything. This StackOverflow thread discusses it.
Please, let us know if you have any questions that are directly related to our components.
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