When you are developing signal R in asp.net, make sure that it's using jQuery -1.10.2 and that it's not using multiple jquery files or instances. One way to check if SignalR is not working to able to know if it's using multiple jQuey instances on the page is by going to Developer tools for the browser you are using and then navigate to Network tab, then click on XHR. After doing that, go and refresh the page or just hit F5 to refresh the page and check under Initiator to see if the only one version of jQuery is initialized.