[TYPO3-seminars] CSV-Export via backend

[Andreas Siemer]

Hi,
I wonder if there is a trick to get CSV-files of registrations, like is 
is described in the Manual.
When I click the button "csv-export" in list-view, I get a file named 
"registration.csv" which is completely empty (0 byte).
I´m logged in as admin,
the static template is set for the part of the tree with the sysfolder 
which contains the registrations

TYPO3 4.5.17
seminars 0.9.5
onetimeaccount 0.8.1
ameos_formidable 1.1.549
oelib 0.7.8


Thanks for any hints & have a nice day!

Andreas