How to play video from protected ftp server

Hello, I try to use your plugins to stream file from a protected ftp server.

I try to insert it in the post (wordpress) in this mod:
[flowplayer src=ftp://username:password@server.com/path/to/the/file]
The player is loading but does not play any file. It says : 200, Stream not found…and I saw that he try to find the file on a location that include ‘http://name-of-my-site.com/ftp://username:password@server.com/path/to/the/file’
How can I modify it to load the file from ftp server ?

Thank you for your answer.