Actually, the main problem looks the MySQL connection. On adodb-mysql.inc.php there must be some kind of line like this:
mysql_connect("localhost","user","password");
check that all of the values are correct.
The first is the name of your server. You can call it localhost,or refering to it by the IP or the domain name. (This last one might not work)
The second is the user name. And the third is the password.
After you connected, you have to use
mysql_select_db("database_name");
to begin working with that DB
hope it helps you, my english friend.
fLIPIS
P.D: I love England. I used to live in Bournemouth. Beautiful country of yours, that Britain.