KDE IM Contacts Not Grouping Windows In Panel?

[JeZ-l-Lee]

Hi,

I am using Kubuntu 14.04 LTS 64Bit fully updated.
I also use default IM client "KDE IM Contacts".

My problem is that KDE IM Contacts application does not group open windows in panel?
(I am using Icon-Only Task Manager)

Here is a screenshot of the problem:


How would I tell KDE IM Contacts to group open windows associated with it in panel?
Thanks!

Jesse