What is your exact error message?
PHP4 uses the old style mySQL passwords, meaning you must force mySQL to do it as well...
First, connect to your mySQL server on command line, and manually reset every password as follows:
mysql> connect mysql
mysql> select user, host from user;
For each user/host pair, do:
mysql> set password for 'user'@'host' = old_password('yourpassword');
Then, edit your mysql config file (my.cnf) and add the following to the section under [wampmysqld]:
old_passwords=1
Restart mySQL and you should be all set. For more info on mySQL password supports, check out [
dev.mysql.com]