hello,
i have set some username and passsword for MYSQL on my WAMP
but in the initialization file i have different passworn and username....
now phpadmin is not opening ..
how should i retreive my username and password now --using MYSQL console

You might have to totally remove the user and re-create him...I'm sure there's a slick way to do it in information_schema, but I don't recommend making edits to those tables unless you're really comfortable with MySQL. I've found that the MySQL GUI tools are much easier for user management than the console...

http://dev.mysql.com/downloads/gui-tools/5.0.html