Can't Upload Files To FTP :s

hi, i am trying to upload files to a gaming server ftp, but whenever i try, i get this error message in to Log.

[11:14:17] 150 File status okay; about to open data connection.
[11:14:28] 451 Requested action aborted: local error in processing.
[11:14:28] MDTM 20061026144204 awe.cfg
[11:14:28] 550 The system cannot find the file specified.
[11:14:28] Transfer failed.

Please Help :s