FXP [server-to-server] HELP

Hi, I am new to SmartFTP and am trying to use the FXP feature. I see from a post earlier this month (by sreerao) that others have the same problem. When I attempt to transfer, the server I'm transferring FROM immediately goes into passive mode, and the server I'm transferring TO goes into a timeout. What would be a reason for this? Are there server settings that need to change? All I know is that they are Unix boxes, but I do have access to the administrator. Perhaps Darix, who answered the earlier post, has some answers?

Thanks much.

depends of the ftp software used. not realy need to be a unix/linux server.

it just need to be the soft capable to work.
in linux is glftpd or in windows server-u. There are many options. but this one are 2 options avail.

hope it works.

carlos