The server has unexpectedly closed the connection

I succesfully logged into a server and saw the content available.

I selected what I wanted to download and chose Download.

Now the log shows

STATUS>    Connecting to "64.27.7.34" on port 21.

STATUS>    Connected to 64.27.7.34:21 from 192.168.1.78:60507.

ERROR>    The server has unexpectedly closed the connection.

and cycles this 8 more times.

I cannot now see the content on the server and if I close FT Voyager and restart it just goes thru'

STATUS>    Connecting to "64.27.7.34" on port 21.

STATUS>    Connected to 64.27.7.34:21 from 192.168.1.78:60507.

ERROR>    The server has unexpectedly closed the connection.

9 times again!

Any thoughts would be helpful.

Nigel