Problem with Tiled Services in 10.1 and Silverlight.

[BrentHoskisson]

I have migrated over to 10.1 from 10.0.  My services are set up and work well as DynamicMapServiceLayers in silverlight.  I have set up the tiles in Catalog and can see them in the REST services (Works in ArcGIS Server Manager).  However when I switch to TiledMapServiceLayers in Silverlight, I get nothing.   Fiddler doesn't give any information.  What is the problem?

Thanks

[BrentHoskisson]

Update

Turns out it is the spatial reference that I defined.  Apparently this:

<esri:Envelope.SpatialReference>
                        <esri:SpatialReference WKID="2237"/>
</esri:Envelope.SpatialReference>

is incompatible with this:

(from the REST service web page)
Spatial Reference: 102659  (2237)

...in ArcGIS Server v. 10.1.  I don't know why.  It works fine in 10.0.  Any ideas?  For now I just removed my spatial reference from the Silverlight XAML.

Thanks