Cannot open an appointment from Service Calendar after it is added onto dashboard.

Hi,

I just add the service calendar onto dashboard by following this article:

https://community.dynamics.com/crm/b/misscrm360exploration/archive/2014/07/17/want-to-see-service-calendar-on-crm-dashboard

It showed me service calendar perfectly on dashboard.  But I cannot open my appointment from here whenever I change to day, week or month. If I go to service/service calendar and find same appointment, I can open it by double clicking it.

Anyone has any idea what could be the problem? Same issue happened for personal calendar when I added it on dashboard. The only different between service calendar and personal calendar on dashboard is for personal calendar, when I change the calendar to show whole month, I can open the appointment. 

Any help will be very appreciated! 

Carys