[TYPO3-commerce] pricefromnet does not affect backend

[Cedric Spindler]

Hello

If I set pricefromnet, I'm still not able to enter the net price in 
the backend, it's always set to 0 because the gross price is empty.

Is there any backend setting which changes this? I searched the TCA 
but could not find the function which calculates this. I would like to 
fix that but I need a hint.
-- 
Best regards,
Cedric Spindler