[Zope] How to use manage_addLocalFS

Hi all, I want to create an LocalFS object. I use <dtml-call "manage_addLocalFS('LocalFS', 'Tis is the title', '/home/zope/productimages')"> but that doesn´t work. Simular to <dtml-call "manage_addFolder('Folder', 'Tis is the title')"> Any ideas? May I have to use a externel methode like in the mail I posted before?