user warning message + no child pages

Hi,
I have installed this module on Drupal 5.3.
I have OG.
Book expand filter set to Groups.

I created a group, it created a book automatically, but when I tried to add child page, I could create only a top level book, there was no parent to choose from.
Then I tried to edit the child, it gave the following warning, in the edit page as well as 'Create a book page' page, with no option to select parent.

user warning: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '% ORDER BY b.weight, n.title' at line 1 query: SELECT n.nid, n.title, b.parent, b.weight FROM node n INNER JOIN book b ON n.vid = b.vid WHERE n.status = 1 AND n.nid <> % ORDER BY b.weight, n.title in /usr/www/users/avnet/drupal/includes/database.mysql.inc on line 172.

When I reset the filter to defaults this message disappears but then all other books gets listed which I don't want.
I want a group member creating book page to see only that group's handbook as parent.
I removed all the books, removed all the groups, started all over again, but with no success.
Now when I create a group it is not even creating a book, gives me the same warning message.

Any suggestion as to how to solve this problem?
Thanks,
Manoj

ps. i am new to Drupal, but is in the process of setting up drupal for our community Intranet where I need to restrict various groups to edit only their book.