I'm also having the same issue.
This is how I have the DayPilot calendar set up.
And here is the EvenClick function.
protected void DayPilotCalendar1_EventClick(object sender, DayPilot.Web.Ui.Events.EventClickEventArgs e)
testClick.Text = "Event ID: " + e.Text;
But it never seems to call it and my label stays the same.
Any help would be greatly appreciated.