DelPiero, not exactly, that's "type" of FTP server. i'd like to know exact software and perhaps exact version number. it's often one of the 1st few lines in welcome message during login.
MidKnight, do we have to use a jackhammer to get it into your head that flashfxp doesn't see any data during fxp can not possible cause this error.
geez
compare status logs from flashfxp and smartftp and see that they are exactly the same