samba - Nov 2006 - Access denied when trying to copy a file to a samba share

I have a fedora core 6 linux server that I am trying to set up a samba share on.
The rest of the computers on my network are running windows XP with all of the
latest patches.  I am running a domain called nissley for my network.

I decieded to set up a samba share with user security because it appears to be
the easiest to set up that still has security assocated with it.

I am able to connect to the samba share and browse the files but I can not copy
anything to the share.  I am able to copy files from my samba share to my XP
computer.  The user that is trying to copy files to the share is part of the
group assinged to the directory the share is pointed to.

Here is my smb.conf file.  Any assisance would be apprecited.
[global]
workgroup = nissley
netbios name = MythTV Box
server string = MythBox
security = user
log file = /var/log/samba/%m.log
max log size = 150
local master = no
username map = /etc/samba/smbusers
encrypt passwords = yes

[homes]
        comment = Home Directories
        browseable = no
        writeable = yes

[movies]
        comment = movies
        path = /video/movies
        writeable = yes
        read only = No