13>HTTP protocol error. 404 Not Found / Amazon s3

Hi
 
I am trying to copy files from an ftp server to my Amazon S3 server.
 
Login is fine, but when I try to copy files such as this one:
03 From code to magic.mp4
 
I get the following error on my Amazone s3:
13>HTTP protocol error. 404 Not Found
 
I have tried to change the name to 
03fromcodetomagic.mp4
but is also doesn't work.
 
Any suggestions?
Thanks