MyBook Live FTP file transfer fails "too many connections from your ip address..."

I set up MyBook Live as advertised on my router, DDNS port forwarded, and I am able to log in using FTP from any computer. Login is correct and I can browse the files and directories.  But the problem is when I try to transfer any file to and from the drive, it refuses and comes up with the error above. Currently talking to cutomer support but they seem very weak on this subject. Drive has FTP access advertised and built in and I expect it to work as it should. Did anyone have this problem?

Are you doing clean FTP from a browser or do you use a client?