Error accessing index

This is what I am getting when I try to access my guestbook after I installed it.
For some reason it keeps changing my user name to root. I am still grasping the knowledge of databases and PHP.
Warning: mysql_connect(): Access denied for user: 'root@localhost' (Using password: NO) in /home/jakerobi/public_html/gbookphp/lib/mysql.class.php on line 30
Connection Error

MySQL Error : Connection Error
Error Number: 1045 Access denied for user: 'root@localhost' (Using password: NO)
Date : Sat, January 13, 2007 09:13:58
IP : 66.139.155.76
Browser : Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.9) Gecko/20061206 Firefox/1.5.0.9
Referer :
PHP Version : 4.4.1
OS : FreeBSD
Server : Apache
Server Name : jakerobinson.net

It is refering to the database username and password which are stored in the config.inc.php file.

okay so how do I go and changed that info? I know it is wrong.. I just ain't sure how to change it.
I also don't seem to be able to get on any part of my gb. and I was unable to get to that stored info.. I am basically stuck with alot of unuseable info on my server

Okay update..
I took in where I can find the info and opened it on my server which turned on my dreamweaver and opened up so I was looking at the code and seen all the info I needed to change it and did so in DW. I then reloaded it after I saved it to my server and it is now open..

Now all I need to do is change the look to something that fits my page..

Thanks.