Cannot drag & drop media onto the timeline

Nuwanda HamburgPosts: 177 Enthusiast
Good evening & sorry to bother you.
I just bought Hitfilm and cannot place a video sequence onto the Editors timeline.
I checked the Project setting - they are matching the video properties.
If I am now try to drag&drop a sequence onto the Editors timeline I only see some kind of "prohibition sign" (is it called like this??). I watched the tutorials and cannot see that I'm making anything different like shown there.
(I run Hitfilm Ultimae Full Version on a Win7 64bit PC.)
Many thanks for your kind replies.