I don't know how the cp of apache2triad 1.3.1 looks like,
if you are using windows platform, you can try this at dos promt
this is the command to chnage the password
c:\path\to\mysql\bin\mysqladmin - u root password secret
mostly the default username is root and the password is blank, no password was issue.
Base on the command smple, the username is root and the new password would be secret.