HI, i have installed the latest version of WAMP, now when I click on phpmyadmin option from system tray wamp icon, so it does not open the phpmyadmin, but gives me an error which is following.

Welcome to phpMyAdmin

Error

MySQL said: Documentation
#1045 - Access denied for user 'root'@'localhost' (using password: NO)
phpMyAdmin tried to connect to the MySQL server, and the server rejected the connection. You should check the host, username and password in your configuration and make sure that they correspond to the information given by the administrator of the MySQL server.

Why i am having this?
the tutorial i am following he has same problem to occur but in that video there was a button for him which is not in mine, (he has old version of wamp).

Please guide me