Duration Bar - Scheduler 7.6

I have just updated my DayPilot dll to version 7.6.3002.0 from 7.3.2861.1.

Before this update, my Duration Bars were displaying properly. Now, with the update, they are no longer there.

In my .aspx page, I include the DurationBarVisible="true" property, and in the BeforeEventRender I include these lines of code for each type of event I display:

e.DurationBarColor = "#7cc144";
e.DurationBarVisible = true;

Can you please tell me what change I need to make to ensure that my duration bars are still visible?

Thanks in advance.