Nah, you're not screwed.
The login for the ftp site is a generic one--it doesn't use your own personal login credentials. That's why it wasn't working for you.
The proper credentials can be found in this thread:
http://www.ppcgeeks.com/ppcgeeks-ftp...sed-t2497.html
So use it to download PPCPIMBackup as naigaboy suggested. It is an awesome free app and will do what you need with ease.