425 Can't build data connection: Connection refused

[Relaxo]

What does this mean, i do get this when i connect to a ftp serv with linux and glftp 1.23.
but its only this one ftp, every other with glftp any version (1.23, 1.24, 1.25) is working.
and the error shows only up in flasfxp, when i use smartftp, leechftp or pftp it is working fine
i disabled firewall etc but nothing worked
im using the latest version of flasfxp