Problems when migrating guestbook to new server

Hi,

Hope someone can help with this please. I'm pretty new to php but I managed to get the latest version of the guestbook working a couple of months back. I used the install.php script to create the mysql database and tables with no problems.

I am now migrating the site to a new server and wish to keep all of the guestbook entries if possible.

I uploaded all of the (working) files from the old server to the new server and can see the index.php page fine. However, when I try to submit a new post, it just throws me back to the add entry page.

Is this something to do with the mysql config please? The database is still on the same server but I can't seem to write to it from the new add entry page. Do I need to reconfigure the database somehow or perhaps the path to it?

Thanks
spon