Can't access to write external harddrive as ntfs file system on debian 6.03

If you don't write data to external harddrive as ntfs file system on debian-6.03, you can make sure about ntfs-3g package installed already. If you haven't install the ntfs-3g package, you should open your terminal and type command now.

Step 1:

$: apt-get update

Step 2: install package

$: apt-get install ntfs-3g

Step 3: Try to mount external hdd again.

$: mount /dev/sdx1 /mnt/external

Step 4: Try to write data to external hdd.