[horde] problem with turba under horde 3.0.9

[afi arno floerke Ingenieurbüro für Aku]

Hello,
I installed first horde 3.0.8 and patched it with ticket 3123, then I 
installed Turba 2.0.5 for the first time.
I get an entry in the horde menu with Organisation/Adressbook.
When I click on the Adressbook entry, nothing changes, I get an blank 
screen with  the horde menu on the left side only.
Is this a bug or is it a configuration problem? The test-program shows 
no errors.

Steffen