'DayPilot.Web.Ui.DayPilotNavigator' is not defined

It looks like you might be using the Lite (open-source) version of DayPilot (http://www.daypilot.org/daypilot-lite/) with a sample code created for DayPilot Pro.

DayPilot Lite for ASP.NET WebForms doesn't include the DayPilotNavigator and DayPilotMenu controls. See also the availability details in the documentation:

http://doc.daypilot.org/navigator/
http://doc.daypilot.org/menu/

You can download a trial version of DayPilot Pro here:
http://www.daypilot.org/try/

Thanks Dan for your speedy response.

Yes I downloaded the daypilot-lite version and used the shift scheduling sample code, hence the error that I received.