[TYPO3-shop] Insert Records tt_products

[Uwe Graber]

hello,

i tried to "insert records" via normal t3-content-element. i extend 
tt_products/ext_tables.php with

t3lib_div::loadTCA('tt_content');
$TCA[tt_content]["columns"]["records"]["config"]["allowed"] .= 
"tt_products";

well, now i get products as allow type for insert record, but in the 
frontend i just get an error-message with the allowed display-mode-types....

thanks for any hints...

uwe