Problems with BSD ftp protocol

[P.GRIFFITHS]

Hi,
   We are having problems when trying to connect to an FTP daemon running
on a unix box. The connection to the Control port is no problem, but when we
try to connect to the data port in order to send files a `connection
refused' is sent back over the control port. Running as root makes no
difference ! Any ideas, suggestions or even example code of how to do
this correctly would be greatly appreciated.
 
   Send responses to me and I'll summarise over the net.

   Thanks in advance,

P.Griffiths. Daresbury Laboratory Graphics Group.

JANET:       P.Griffiths at uk.ac.daresbury
Internet:    P.Griffiths%daresbury.ac.uk at cunyvm.cuny.edu
EARN/BITNET: P.Griffiths%daresbury.ac.uk at UKACRL
UUCP:        P.Griffiths%daresbury.ac.uk at ukc.uucp