[TYPO3-shop] limit/limitImageSingle does not work in 2.7.0

[Niels Tiedt]

Hi list
When i configure these constants i cannot insert more then 10 images in 
the product-content element -> field image.
My TS looks like
plugin.tt_products.limit = 50
plugin.tt_products.limitImageSingle = 50
Why does this not work?
Hope you can help

THX Niels Tiedt