Guestbook: 1046 No Database Selected ??

Hi,

I hope someone can help me with the guestbook.

I have installed MySql 4.0 en created a DB named TESTING, also created some users with superuser privilege...

When I do the install.php all goes well, table is created, entries updated, but when i click the admin.php an error occurs ?

MySQL Error : Database Error
Error Number: 1046 No Database Selected

I can access the DB through <cmd> and the user has access to it, I read something about doing a DUMP with phpmyadmin but I tried and that did not work ....

PLEASE HELP !! I have spent 2 days testing/configurating and I am getting a bit tired.....

Thanxzz in advance !!

Same problem overhere.
Just installed the guestbook, but when i enter it, i get the same errors.
Check: http://www.spaapen.net/forum/guestbook.php

Thanks in advance

Nevermind, made a stupid mistake with not filling in database dat