Problem and Solutions.....

Changing Mysql password........

c:\wamp\bin\mysql\mysql1.5.36\bin> mysql --user=root --pass mysql

Enter password:

mysql> update user set Password=PASSWORD('Your New Password') WHERE User='root';

this will change your existing password. In this case password is not set. if your pass word is 'abc' then you need to enter abc as you password while asked.

also if you are using wamp then there may be conflict and the password may no be changed in config.ini.php file 

make a change in config.ini.php

$cfg['Servers'][$i]['password'] = 'newpassword';