550 PErmissino denied

[ND-]

[19:36:28] 200 PORT command successful.
[19:36:28] STOR file.ext
[19:36:29] 150 Opening ASCII mode data connection for file.ext.
[19:36:29] RETR file.ext
[19:36:29] 550 file.ext: Permission denied.
[19:36:29] ABOR
[19:36:59] Transfer Failed!
[19:37:29] 421 Timeout (60 seconds): closing control connection.

The 550 is from the sender ftpd (200 glftpd 1.27_Linux).