Hey thanks for the answer. I choosed local help all the time and the path is correctly, the normal help works fine.
The "Add Content From Disk" Window from the Help Library Manger is there also and i can Add and Update the help. I meant that there comes no question if i want to proceed while updating. He updates, all shows fine and finish. But in the past, the manager asked me if i want to proceed, while updating, i don't know if this is important.
I will try now to uninstall sandcastle and the Help File Builder and install the newest version.