Woops, you are not having a good time recently are you.
- Stop the mysql service - wampmanager -> MySQL -> Service -> Stop Service 
- Edit the my.ini file - wampmanager -> MySQL -> my.ini 
- Find the [wampmysqld] section in the ini file - Add this line directly after the section [wampmysqld] - skip-grant-tables 
- Restart the mysql service. - wampmanager -> MySQL -> Service -> Start/Resume Service 
- Open the MySQL console - wampmanager -> MySQL -> MySQL Console - just hit enter when asked for the password. 
Now we are going to give all privilages to your new account.
enter the following 2 commands at the mysql> command prompt, each with a semi colon at the end of a line, and press ENTER after each line to issue the command to mysql.
GRANT ALL PRIVILEGES ON *.* TO 'Your_Userid'@'localhost' WITH GRANT OPTION;
FLUSH PRIVILEGES;
Note If you created this new user with more than one domain i.e. xxx@localhost and xxx@127.0.0.1 you should do this for each domain
- Now enter 'quit' at the mysql command promt to exist mysql. 
- Stop the mysql service - wampmanager -> MySQL -> Service -> Stop Service 
- Edit the my.ini file - wampmanager -> MySQL -> my.ini 
- Find the [wampmysqld] section in the ini file - Remove the 'skip-grant-tables' parameter we added earlier.
DO NOT Leave this parameter in the ini file its a HUGH security hole. 
- Restart the mysql service.
wampmanager -> MySQL -> Service -> Start/Resume Service 
You should now be able to login with phpmyadmin or SQLBuddy using your new useridand the new password you have just set for that user.