There may be two issues here:
1) It's possible that the warning message has an error in it (it's new code), although I haven't seen that here. What OS are you using?
2) In any case, ftp isn't working.
The most common cause is a firewall on your development machine is blocking Java (which is doing the ftp).
Added to the FAQ at
http://firstforge.wpi.edu/sf/wiki/do...pilib/wiki/FAQ