Pier: Help please - cannot embed / call WATask

Hi, when I call: or embed a WATask, the main area of the Pier page shows nothing. It also remains empty when I go to other pages. I have also tried to embed the sushi store example, like so: - In the Pier menu use Add... component ...name: store, then choose "Store" from combobox - embed store in another page using +store+ Same problem. Both my code and the embedding of store work without problems in my older Pier image: Seaside2.7a1-pc.227 Magritte-Model-lr.279 Magritte-Seaside-lr.238 Pier-Model-lr.162 Pier-Seaside-lr.194 Pier-Security-mberth.88 The problem occurs in a newer image (derived from the sq3.9-7067dev07.09.1.image): Seaside2.7a1-pc.227 Magritte-Model-lr.283 Magritte-Seaside-lr.238 Pier-Model-lr.168 Pier-Seaside-lr.207 Pier-Security-mberth.92 What can I do? Cheers Matthias