kde clock applet does not display kontact events

[pma]

As described in the title, I'm not able to make the kde clock applet displaying Kontact/Calendar information. And I have no idea where to seek information to debug this.

The only piece of related information I have found crawling the web was :
http://lists.opensuse.org/opensuse-bugs/2012-09/msg01139.html
Which gives quite few technical details, and may be unrelated though the symptoms are similar.

At this point, I have "Personnal Calendar" setup in Kontact.
In the digital clock settings, "Display Kontact informations" box is checked.
No future events is shown in the clock applet calendar.
And I'would be grateful to anyone able to tell me where to look at to understand this mis-synchronization.

regards,
_________________
Pierre-Matthieu Anglade