local disk access problem of rdesktop

[Can-Hua Chen <chencanhua@fudan.edu.cn>]

I am using rdesktop
( rdesktop -f HOST_IP -u USERNAME -p PASSWD -r sound:local 
-r disk:L=/home/LOCAL_USER)
and trying to access local file system on remote XP desktop.
However I am reject to access on remote XP, saying that
I have no right, although I do be able to see the "L" volume