Your last line - to include the hubs - have some errors...
1. A syntax error, that can prevent form the browser to even parse this line
<script src="/SignalR/hubs/" %>"
></script>
2. You handle SignalR/hubs like a folder where it is a file (with dynamic content)...
<script src="/SignalR/hubs"</script>
Read here about all the SignalR/hub issues...
http://www.asp.net/signalr/overview/guide-to-the-api/hubs-api-guide-javascript-client[
^]