Post the complete log and not only parts of it!
[12:37:19] 211 End of Status
[12:38:49] NOOP
[12:38:49] 200 NOOP command successful
[12:40:19] LIST
[12:40:19] 425 Unable to build data connection: Invalid argument
[12:41:49] NOOP
[12:41:49] 200 NOOP command successful
[12:43:19] NOOP
[12:43:20] 200 NOOP command successful
[12:44:50] NOOP
[12:44:50] 200 NOOP command successful
[12:46:20] NOOP
[12:46:20] 200 NOOP command successful
[12:47:50] LIST
[12:47:50] 425 Unable to build data connection: Invalid argument
[12:49:21] NOOP
[12:49:21] 200 NOOP command successful
[12:50:51] NOOP
[12:50:51] 200 NOOP command successful
[12:52:21] NOOP
[12:52:21] 200 NOOP command successful
[12:53:51] NOOP
[12:53:51] 200 NOOP command successful
[12:55:22] NOOP
[12:55:22] 200 NOOP command successful
[12:56:52] LIST
[12:56:52] 425 Unable to build data connection: Invalid argument
[12:58:22] LIST
[12:58:22] 425 Unable to build data connection: Invalid argument
[12:59:52] NOOP
[12:59:53] 200 NOOP command successful
[13:01:23] LIST
[13:01:23] 425 Unable to build data connection: Invalid argument
[13:02:53] LIST
[13:02:53] 425 Unable to build data connection: Invalid argument
[13:04:23] NOOP
[13:04:23] 200 NOOP command successful
[13:05:53] NOOP
[13:05:53] 200 NOOP command successful
[13:06:56] 421 No Transfer Timeout (1800 seconds): closing control connection.
[13:06:57] Server closed connection
