[TYPO3] FORMidable renderlet:LISTER Details Column

[LittleDolphin]

Hello,

I would like to have a details column in a renderlet:LISTER, so that 
every record/line from the list can be edited.

I would like it to be as in this screencast: 
http://www.ameos.com/fileadmin/formidable/sc6/flv-sc6.html, but this 
method does not work. I also found a message on 
typo3.projects.formidable newsgroup:
http://web23.gknetzwerk.de/index.php?id=68&tx_nntpreader_pi1[nid]=74&tx_nntpreader_pi1[mid]=251874&tx_nntpreader_pi1[page]=10&cHash=afea9daadc
but nobody answered to it.

Does anybody have any ideea how this works?

Many thanks in advance