why keep it in this place , may be you can allow to change it from GUI or you can keep it the same as the login password for webuzo or you can atleast not ask the user for login details when he wants to log in to phpmyadmin

Thank you for the suggestion we will try to implement this soon.

i tried but the problem is cannot seem to log in via ftp , there is no port no. mentioned .

You should use Port no : 21 which is default for FTP.
Let us know if you are still unable to FTP.