Silverlight and error HTTP/1.1 504http://developers.de/blogs/damir_dobric/archive/2010/05/24/silverlight-and-error-http-1-1-504.aspxWhen working with WCF in SIlverlight sometimes you  might get following error: The remote server returned an error: NotFound.   at System.Net.Browser.AsyncHelper.BeginOnUI(SendOrPostCallback beginMethod, Object state) at System.Net.Browser.BrowserHttpWebRequestenCommunityServer 2008 SP1 (Build: 30619.63)