connect my sql with php

[sql]

Hi all,
I need to learn Mysql, in dos
C:\Program Files\MySQL\MySQL Server 4.1\bin>mysql -uroot -p mysql
Enter password: ******
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 4 to server version: 4.1.14-nt

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

mysql> CREATE DATABASE first_test;
Query OK, 1 row affected (0.00 sec)

mysql> use first_test
Database changed
mysql> CREATE TABLE people (
-> id int UNIQUE NOT NULL,
-> first_name varchar(40),
-> surname varchar(50),
-> PRIMARY KEY(id)
-> );
Query OK, 0 rows affected (0.06 sec),
but when I try the following code
<?php
$username = "uroot";
$password = "123456";
$hostname = "localhost";
$dbh = mysql_connect($hostname, $username, $password)
or die("Unable to connect to mysql");
print "connected to mysql<br>";
$selected = mysql_select_db("first_test",$dbh)
or die("Could not select first_test");
if (mysql_query("insert into people values('5','Hazel','Burger')")) {
print "successfully inserted record";
}
else {
print "Failed to insert record";
}
mysql_close($dbh);
?>
I always got error at unable to connect mysql.
in MS sql is easy to find is password, where to find the password or set new password in My sql? please help!
thank you
________
No2 vaporizer