For some reason one one of my shares most of my users are getting an "you need permission to perform this action" when trying to write a file or folder to it. I cannot figure out why this is getting stopped up. My test user is in my ldap Ugrad group. Below is what I have written in my smb.conf file for this share. Any help would be appreciated on how to troubleshoot this...

comment = Common Volume
inherit acls = Yes
force create mode = 0777
security mask = 0777
directory security mask = 0777
force directory mode = 0777
#force security mode = 0
#force directory security mode = 0
path = /common/
read only = no
writeable = Yes
write list = @Admins @faculty @staff @Ugrad @Grad
valid users = @Admins @faculty @staff @Ugrad @Grad