back up drive d

[demo]

Hi
I am using cygwin1.dll to run rsync and ssh on a xp machine( no complete 
cygwin install). I can use this commannd to backup my folder on the C drive:
"rsync251-2 -e ssh -av "\Documents and Settings\demo\Desktop" 
demo at removehost:/tmp/test/".

But I am unable to figure out how to backup the entire D drive.
"rsync251-2 -e ssh -av "d:" demo at removehost:/tmp/test/"

I got this error message
ssh d: no address assoicated with name.

Thanks for your help.