[TYPO3-english] powermail - excludeFromPowermailAllMarker

[Robert Wildling]

Hi, I am trying to exclude some fields from the confirmation page of a 
powermail form. To do so I use this TypoScript...

plugin.tx_powermail {
   settings {
     setup {
       excludeFromPowermailAllMarker {
         confirmationPage {
           excludeFromMarkerNames = rumba,salsa
           excludeFromFieldTypes = check
         }
       }
     }
   }
}

..but it doesn't work. Am I doing something wrong here? Does anybody 
have a hint for me?

This actually happens on 2 TYPO3 6.2.6 sytems with powermail versions 
2.1.4 and 2.1.5.

Thank you!
Robert