MACROMEDIA STUDIO 8-EXPLORING STUDIO 8 Manual page 331

Many servers use symbolic links (UNIX), shortcuts (Windows), or
aliases (Macintosh) to connect a folder on one part of the server's disk
with another folder elsewhere.
For example, the public_html subdirectory of your home directory on
the server may really be a link to another part of the server entirely. In
most cases, such aliases have no effect on your ability to connect to the
appropriate folder or directory; however, if you can connect to one part
of the server but not to another, there may be an alias discrepancy.
If you encounter an error message such as "cannot put file," your
remote folder may be out of space. For more detailed information, look
at the FTP log.
In general, when you encounter a problem with an FTP transfer, examine
the FTP log by selecting Site > Advanced > FTP Log.
Troubleshoot the remote folder setup (optional) 331