John,

   I have run into somewhat the same situations.  As someone else said, 
FTP-TLS and firewalls do not play nicely with each other.  Primarily, some 
firewalls do what is called "stateful inspection".  The client always 
(unless told to differently) tries to open the command channel to port 21 
on the server side.  The problem during ssl negotiation is that the 
firewall on one side of the firewall is trying to validate the ftp traffic 
across the port connection.  

  Verify with your firewall folks if they are doing "stateful inspection" 
(if your using Checkpoint NG firewall, the service def for port 21 will 
have protocol = FTP).  If they are, have them change the rule to turn that 
off.  If they are not doing stateful inspection, talk to the folks on the 
other end of your connection, to verify they are not doing that.

Pete

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