[TYPO3-project-seminars] Registration Process stops at step 1

[Markus Bucher]

Hi,

after setting up seminars everything to work out fine. There are no more 
warnings about wron or missing configuration.

After logging in as a FE-User the registration process stops at the 
first page (step 1 of 1). The form returns to itself without any message.
The GET-Params:
id=237&tx_seminars_pi1%5Bseminar%5D=8&tx_seminars_pi1%5Baction%5D=register

plugin.tx_seminars.attendancesPID = 235
plugin.tx_seminars.enableRegistration = 1
plugin.tx_seminars_pi1.enableRegistration = 1
plugin.tx_seminars_pi1.listPID = 233
plugin.tx_seminars_pi1.detailPID = 234
plugin.tx_seminars_pi1.registerPID = 237
plugin.tx_seminars_pi1.loginPID = 237
plugin.tx_seminars_pi1.thankYouAfterRegistrationPID = 241
plugin.tx_seminars_pi1.pageToShowAfterUnregistrationPID = 244
plugin.tx_seminars_pi1.myEventsPID = 227

seminars(233)
-mysems(227)
-seminars(sysfolder 225)
--Attendances(sysfolder 235)
-Details(234, hidden in menu)
-Register(237)
--Thankyou(241, hidden)
--Cancelled(244, hidden)


seminars 0.6.1
formidable 0.7.0
oelib 0.4.1
typo3 4.2.1
RealUrl 1.4.0


Is there something missing?

Cheers and Thank you,
Markus