I was looking for some working examples in the demo section of your site and noticed some runtime errors when trying to get to the Menu.
http://demos.telerik.com/ASPNET/Prometheus/Menu/Examples/Overview/DefaultVB.aspx
http://demos.telerik.com/ASPNET/Prometheus/Menu/Examples/Overview/DefaultCS.aspx
http://demos.telerik.com/ASPNET/Prometheus/Menu/Examples/Overview/DefaultVB.aspx
http://demos.telerik.com/ASPNET/Prometheus/Menu/Examples/Overview/DefaultCS.aspx