NTFS partiton access denied in fc4 samba server

[Barry Yu]

In FC4 I have updated my kernel with ntfs rpm package and can mount, 
access ntfs partition read file in it locally.
I also mounted Fat 32 , and then started the samba, from a remote XP 
machine I can see both Fat32 and NTFS partitions in FC4 samba server, 
and can access the fat 32 partition, retrieve the data it it,  but when 
tried to open the NTFS partition, access is  denied  ( saids access 
permission problem ).
I setup the samba and configured the smb.conf as below;
[global]
security = share

[FAT32]
comment=Fat 32 data
path=/mnt/f32
read only=no
public=yes

[NTFS]
comment=NTFS data
path=/mnt/ntfs
read only=yes
public=yes

What have I missed?