Forum OpenACS Q&A: Response to selective authentication

I have tried to add/register static section using the content sections module. I have created a directory called /Static/ under /www/ put a index.html in there.
In the "Section url stub" field I put /Static/, or the full address of the subdirectory.
I am getting the following error: "The requested URL cannot be accessed due to a system error on this server."
I looked into "add-link-2.tcl" which is called up when I press add button, but I can't see anything that may explain the error.
I have also read the "docs" mentioned above but I still couldn't figure out how this works.

Thanks for any advice.