Hi again, Wim!
Sorry about the delayed response. I had to consult one of our forum experts who knows about the ins and outs of what the forum will do. If you access the FAQ's, there are instructions for getting notifications when a posting has been responded to, although you can usually count on us responding within a couple of days.
I just experimented with the instructions and this seems to be the trail:
From "My Stuff" go to "Watch Lists" then "Edit Watched Topics." You then access "Update Watched Topics" and choose the "Immediately" button under "email Notification."
All the best!
Wendy
