My guestbook is not on my main page dont know how to put it bak on
If you meant that it is not in the menu any more - you can add it there by means of Site menu builder. See more about it here: http://forum.ucoz.com/forum/8-5638-26197-16-1238853004
But make sure that Guestbook module is installed on your website in the first place. If you still have some problems after that - provide a website name for us to be able to check. A screenshot of the place on the main page where Guestbook used to be would be useful.
-Moved to Guestbook-