Thanks Kirk,
I've just called and spoke to Bob who patiently took me thru' several steps, I successfully ftp'd camerabits,
and I managed to send a frame from a different contact sheet to the ftp address I was trying before.
But I still can't send the original batch of files, about 250 mbs without getting the error message.
I tried to send just one of the original problem files, about 2.7 mb, but I just got the error message again.
David. I'm in England its 9.50pm at the moment!