hi mate, usually the username of the box is: root and password is: (blank) ; by default.
If you got it not new it is likely to be changed.
The best thing and most likely easiest is:
Flash the box again with latest image found in download center.
Get technomate control center and connect to ip of the box, from there you can change default password to something of your choice.
Get DCC 2.95 and log in with "root" and whatever you set password to.
You can then, FTP all you want.
Hope it helps.
if you need help on any of the above ask.