"rsync: not found" error with sshwindows

[Anthony DiSante]

I'm trying to copy files from a Linux system to a Windows XP system running 
sshwindows.  I can use gFTP and log in just fine.  sshwindows is based on 
cygwin so you just use /cygdrive/c/ to access the Windows C: drive, etc.

But for some reason, rsync is having problems transferring files to this system:


[1710][~]$ rsync -av /tmp/foo.txt user at windowsbox.com:/cygdrive/c/
user at windowsbox.com's password:
rsync: not found
rsync: connection unexpectedly closed (0 bytes read so far)
rsync error: error in rsync protocol data stream (code 12) at io.c(189)
[1701][~]$


The only thing rsync will say is "not found", no matter how many "-v"s I add 
to the command.  However, /tmp/foo.txt definitely exists -- I can use that 
same rsync command except with a different target, and it transfers fine. 
And /cygdrive/c/ definitely exists on the Windows system; gFTP is able to 
read & write that location with no problems, as are the scp and sftp 
commands-line tools.

Is there a way I can get rsync to tell me exactly what it is that's "not 
found"?  And assuming it is referring to the /cygdrive/c/ path on the 
Windows system, does anyone have any idea why rsync can't see it?

Thanks,
Anthony DiSante