[TYPO3-english] Disable FlexForm configuration fields (in EXT:powermail) via pageTSconfig

[Roland]

hi everybody,

i tried to disable some FlexForm configuration fields via pageTSconfig 
for EXT:powermail (2.0.2) - but did not suceed: the fields are still 
visible.

this is what i tried:

--- quote ---

TCEFORM.tt_content.pi_flexform.powermail_pi1 {
   main {
     moresteps {
       disabled = 1
     }
   }
}

--- /quote ---

disabling the whole tab worked with this:

--- quote ---

TCEFORM.tt_content.pi_flexform.powermail_pi1 {
   main {
     disabled = 1
   }
}

--- /quote ---

does anybody know why disabling the configuration field "moresteps" did 
not work with my pageTSconfig snippet?

kind regards.

roland

ps: i use TYPO3 4.7.3