A session key must be specified when request is signed with a session secret

Oct 4, 2010 at 2:58 PM
Edited Oct 4, 2010 at 3:37 PM

I'm trying to use the like api for Silverlight.

I have a registered application on facebook. The login works but when I call Api.Stream.AddLikeAsync(POST_ID,completedHandler,null) in the completed i receive the following error:

A session key must be specified when request is signed with a session secret.

Can anyone help? 

Thanks.

PS: there's a way to call the Like feature for an URL instead of a post id?