Source editor

Hi,
Returning former user.  How's it going everyone?


The source editor, my favorite feature has brought me back . . .

Reading the Help pages it indicates that I can replace a file by FTP  
as long as I am logged in and have read'write permission on the  
file.  Logged in HOW?  I am logged in on a FTP client, these are my  
files . . . but when I press Store the icon dims for a few seconds as  
if uploading the new file, then the icon reappears, but no change has  
happened to the file on the FTP server.

Does anyone have any insight into how this functions?

tia,
Jim