[orca-list] Top and bottom panel have gone, how can I get them back?

[Hermann <meinelisten onlinehome de>]

Hi,
last Sunday I installed Gutsy on my notebook (Acer with 2,7 Ghz and 512 
MB RAM).
Everything went right so far, but since yesterday morning I had to 
realize, that the top and bottom panels of the desktiop have 
disappeared. I only can reach the desktop.
With Alt+F1 I can open the top panel and its menus, but the bottom 
panel, and that means the taskbar, is unreachable. Main effect: When I 
switch between apps, I can't hear anything.
What did I do till Tuesday? Updated Orca to 2.20.1, installed 
speech-dispatcher, changed the laptop keyboard layout for better 
usability for German, and finally checked several settings in the 
system menu in order to find that well hiddeen feature of starting Orca 
with the login procedure. I also installed FF3 (nightly build).
What can I do to restore the original desktop environment?
Best regards
Hermann

-- 
I use grml (http://grml.org/)