550 Prohibited File Name

 [00:42:07] CWD /public_html/testvb/images/sdfsd

[00:42:07] 250 OK. Current directory is /public_html/testvb/images/sdfsd

[00:42:07] PWD

[00:42:07] 257 "/public_html/testvb/images/sdfsd" is your current location

[00:42:07] PASV

[00:42:07] 227 Entering Passive Mode (207,210,105,40,148,203)

[00:42:07] Opening data connection to 207.210.105.40 Port: 38091

[00:42:07] MLSD

[00:42:07] 366 bytes transferred. (5.76 KB/s) (62 ms)

[00:42:07] 150 Accepted data connection

[00:42:08] 226-Options: -a -l 

[00:42:08] 226 3 matches total

[00:42:10] DELE .pureftpd-upload.44cefe2d.15.4413.4fe133d6

[00:42:11] 550 Prohibited file name: .pureftpd-upload.44cefe2d.15.4413.4fe133d6

That's what happens.. basically there's a file called .pureftpd-upload.44cefe2d.15.4413.4fe133d6 that is undeletable.. can anyone please help?

The server won't let you delete the file, because it is a leftover from a failed upload attempt. This is no bug in SmartFTP. You need shell acess or talk to the server admin to delete the file.