[phpOpenTracker-general] Can't connect to database error

Thanks, ok I've found out that I get a "cannot connect to database" 
error.   But I don't understand why, because I've specified my  MySQL 
database settings in conf/phpOpenTracker.php as well as in the php.ini 
file.  I was able to get phpOpenTracker working with PHP5 and 
JPGraph2.x, and get the index.php working which tracked my web site, but 
since I couldn't get the graphs to show, I was told to use JPGraph1.0. 
However JpGraph1.0 uses PHP4.4, so I had to install PHP4.4.

Anything else that I am missing or how to solve this?

Thanks.

Alvin