#1 Question about Guestbook Settings

[zeljkopg]

When I try to change Guestbook settings it says:

Failed to load module postguestbook (at
function: "updateconfig")

Help please.
and please some more questions:

How to set what is required and what is not, and how
to delete that it can't be added email adress. To
delete e-mail field?

Thank you,