Each FTP server has own file list format. Go to FTP connection settings and uncheck hidden files Look into FTO log (Ctrl+L) and check if there is no "bad command"
If it doesn't help and you are using PSPad 4.5.7, in The FTP log window press list button and send me result in TXT as attachment. -- <http://forum.pspad.com/read.php?2,59771,59772> PSPad freeware editor http://www.pspad.com
