Failed to Connect to Database

First - thanks everyone's work on this.

Second -after getting what appears to be a successful installation, I go to the first page and it's blank. Changed the debug parameter and got this:

Error (DBConnectError)
Failed to connect to database
Error params:
File: /home/denuzzi/public_html/projectpier/environment/library/database/adapters/MysqlDBAdapter.class.php
Line: 32
Backtrace:
#0 /home/denuzzi/public_html/projectpier/environment/library/database/adapters/AbstractDBAdapter.class.php(40): MysqlDBAdapter->connect(Array)
#1 /home/denuzzi/public_html/projectpier/environment/library/database/DB.class.php(95): AbstractDBAdapter->__construct(Array)
#2 /home/denuzzi/public_html/projectpier/environment/library/database/DB.class.php(66): DB::connectAdapter('mysql', Array)
#3 /home/denuzzi/public_html/projectpier/init.php(108): DB::connect('mysql', Array)
#4 /home/denuzzi/public_html/projectpier/index.php(9): require('/home/denuzzi/p...')
#5 /home/denuzzi/public_html/projectpier/public/index.php(9): require('/home/denuzzi/p...')
#6 {main}
Autoglobal varibles:
$_GET:
$_POST:
$_COOKIE: Array (
['PHPSESSID'] => (string) '1b5368b0c86d68377392a1632b97cb5c'
)
$_SESSION:
Execution time:
Total execution time: 0.012295 seconds

Suggestions?