Forum rules DO NOT give out any FTP passwords to anyone! There is no reason to do so! If you need help badly enough, create a temporary FTP account that is restricted to only the files that you need help with and give the information for that. Giving out FTP information can be very dangerous!
You can't do anything because you are on myfreeforum.org host. You have no access to ftp, no access to db. If you want to change it, ask your provider at myfreeforum.org for exported DB. When you'll have exported DB, you have to find proper hosting, manually install phpBB2 and import backuped DB.