TYPO3 Core

hello,

i use an extension which uses a flexform, stored in the field tx_t3sheaderslider(pages-table). i try to read the uid of the page and a value of the flexform by using

lib.sliderstate = TEXT
lib.sliderstate.dataWrap = | {field:uid} {flexform: tx_t3sheaderslider:carouselslider.slider}

the flexform seems to be correct (excerpt)

<T3FlexForms>
<data>
<sheet index="carouselsliderDefault">
<language index="lDEF">
<field index="carouselslider.slider">
<value index="vDEF">1</value>
</field>
...
</sheet>
</data>
</T3FlexForms>

i can't get an output for the flexform part.

regards
wini2