http://developers.de/blogs/damir_dobric/archive/2013/03/19/why-signalr-does-not-use-websockets-part-ii.aspxIf you notice that signalR does not use websockets you might first take a look on this post. But if this does not help there is also seething you have to be aware of. That means depending on how you have created the solution it might happen that websocketsenCommunityServer 2008 SP1 (Build: 30619.63)