[CentOS] lftp SSL_connect error

I am unable to find any documentation about this error message, perhaps one of you has experienced this as well. We have an FTP server that is configured to accept FTP transactions over SSL. The server is working fine, as I am able to log in with lftp from my test linux machine in the office. None of our data center machines are able to connect so perhaps this is a firewall or NAT issue? Anyway here is the very un-descriptive error message:

**** SSL_connect: error:00000000:lib(0):func(0):reason(0) ---- Closing control socket `ls' at 0 [Delaying before reconnect: 18]

It just sits there trying to reconnect over and over again. Any ideas?