SSH, VSFTP login permission, Debian.

I've got a Debian installation set up requiring SSL logins only, and enabled for my IP. I can log in with one user but can't figure out how to enable another one, I set this up a while ago. I added the other user to the user groups I had set up for access.

What other likely things in configuration should I check to figure out how I can enable another login for VSFTPD secure access?

Thanks -

C