Action Import as a Folder Action is not working


i have a folder on my system with papers in PDF format. I copy every paper I download in this folder and import it into DT PE. Thanks to DTs searching engine I do not have to bother with organizing them. So I tried to automate this process by activating folder actions on this Paper-folder and attach the action import script on it. See screenshot here (german, sorry):

But when I drag a PDF into this folder it does not get imported. Regardles if DT is open or not or if I drag the file into the finder sidebar or the main window. What did I do wrong?

For me it works when I use the library script “Folder Actions > Attach Script to Folder”, then select the “action import” script and finally the “DT files” folder.
Of course, the folder actions must be enabled.

Hope this helps.