Cannot drop Lync contact in WPF

Hi,

I'm trying to drag and drop a contact from Microsoft Lync to a ListBox in my WPF application.

For the ListBox I have set AllowDrop to true and have defined the event handlers DragEnter and Drop (and DragLeave, DragOver).

I can trigger the event handlers when trying to drop a file on the ListBox, but drag&drop of contact card from Lync does not trigger any events at all.

I then made a Windows Forms application and here the events are triggered both when trying to drag&drop a file and a contact card from Lync.

Any hints for using drag&drop in the WPF application would be appreciated as I'm going to use WPF which has support for special Lync controls like ContactList, PresenceIndicator etc. and which is also supported for Lync together with SilverLight.

Thanks!