Best to email firstname.lastname@example.org
about FTP problems like this
faster service then the forums.
I am not sure why your ftp pass would be different or lost
make sure you have the right password, if you can log into control panel, or just not ftp? some people have had issues getting into ftp, but can get into control panel.
Also, are you accessing the ftp via a 3rd party program or using IE version of FTP, by simply clicking on the link in file manage on the control panel.