Writing on NTFS

[Instant]

I did
sudo apt-get install ntfs-3g
and everything installed fine

but I still cant write on ntfs harddrives
I get
mkdir: cannot create directory `a': Read-only file system

[devils casper]

post the output of this

sudo fdisk -l

its small L ( -l ).

[Instant]

user@adminPC:~$ sudo fdisk -l

Disk /dev/sda: 320.0 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1       22947   184321746    7  HPFS/NTFS
/dev/sda2           22948       38913   128246895    f  W95 Ext'd (LBA)
/dev/sda5           22948       26771    30716248+   7  HPFS/NTFS
/dev/sda6           26772       30595    30716248+   7  HPFS/NTFS
/dev/sda7           30596       34419    30716248+   7  HPFS/NTFS
/dev/sda8           34420       36243    14651248+   7  HPFS/NTFS
/dev/sda9           36482       38913    19535008+  83  Linux
/dev/sda10          36360       36481      979933+  82  Linux swap / Solaris

Partition table entries are not in disk order

should I remount it as write and read?
if yes, then how????
coz I didnt mount it in the first place
it was mounted when I installed Kubuntu

[devils casper]

should I remount it as write and read?
if yes, then how????

yes. you have remount partitions for write access.
open /etc/fstab file

kdesu kate /etc/fstab

replace ntfs with ntfs-3g in all lines. save file and execute 'sudo mount -a' OR reboot machine.