Please help, I'm not understanding this error. I have a simple Silverlight App with a Tiled layer ESRI service and a Dynamic Layer MapService (dynamic is running off same server as the silverlight app) and when I try to run my Silverlight App, I'm getting the attached error. Something to do with JSON and extraneous data, etc. I saw in one forum someone had mentioned that there might not be a clientaccesspolicy.xml file in the wwwroot folder so I downloaded one and place it in my inetpub/wwwroot folder but no luck. Thoughts?