ArcGIS SilverLight Viewer Server Error

[OsamaZarour]

Hi,
This my first use of ArcGIS Silverlight viewer, the problem is when I'm trying to connect to a local arcgis service located on my gis server.
I always get cannot connect to gis server
I use the following url :  http://ServerName/ArcGIS/rest/services/ServiceName/MapServer.

I tried to use it directly from Internet explorer and it works but it is not working when using it from silverlight viewer ?
Can you help me?
Thanks

[KatherineDalton]

Hi Osama,

Can you check that you have a clientaccesspolicy.xml or crossdomain.xml file at the web server root? See this forum post: http://forums.arcgis.com/threads/57026-Silverlight-and-ArcGIS-server-services?highlight=clientaccess...

Hope that helps,
Katy