New ftp task failed


I need some suggestions on what to look for next.

I built this new FTP task and it failed when I execute it from within VS 2013. The Execution Results gave very limited info.
Task FTP
Validation is completed
[FTP Task] Error: Unable to send files using "FTP Connection Manager".
Task FTP staff failed
Finished, 2:50:46 PM, Elapsed time: 00:01:00.438

My FTP connection tested successful, and I could log in to my destination host with the same credentials using a FTP client.

What else?