slow upload of music to ipod

Hi, i've recently stwitched libraries, and was uploading all the songs from
the new library to my nano, at least trying to..., itunes kept giving me the
message
""attempt to copy disk to "ipod" failed. You do not have enough access
priviledges for this operation. itunes could not save to your music folder
because you do not have write access Check the permissions on your music
folder and floders in your music folder, then try copying again.""
i've checked the permissions and allowed sharing and so forth, but i've only
been able to upload 0.01mb each time before the message pops up again and i
can't upload any further. thus i've been disconnecting and connecting my ipod
for countless times alr, till i got soooo frustrated!!
Has anyone encoutered such problems while running itunes 7 and vistaRC1
build 5600? Any help is greatly appreciated!
Thanks in advance!