LinqConnect with PostGreSql and Silverlight

[enerivdm]

With Visual Studio 2010 I am creating a Silverlight Business Application. I create a Datamodel using Devart LinqConnect Model. I select my PostGreSql database and build the model. So far so good.
Then I try to create a Domain Service with that as the datacontext, but it is not available (The available datacontext/dataobject dropdown contains nothing) What am I missing here?

[AndreyR]

Unfortunately, we don't have techinical possibility to add design time RIA Services support in LinqConnect models.