CentOS 5 :: Mount Error: Can't Mount An Encrypted Volume With An Overlaying Ext3 FS

I created a encrypted volume on top of software raid1. These are my steps:

1. Create logical partition on sda

2. Create logical partition on sdb (same size)

3. Change type to partition to 'fd' for both partitions

4. Check that the both partitions are same size and type fdisk -l /dev/sda && fdisk -l /dev/sdb

5. partprobe

6. Make sure there are no remains from previous RAID installations on /dev/sdb by running: mdadm --zero-superblock /dev/sda6 mdadm --zero-superblock /dev/sdb6

7. mdadm --create /dev/md4 --level=1 --raid-disks=2 /dev/sda6 /dev/sdb6

8. watch cat /proc/mdstat

9. update mdadm.conf mdadm --examine --scan | grep mdx >> /etc/mdadm.conf

10. Load twofish module [root@localhost ~]# modprobe twofish

11. # cryptsetup -y -c twofish-cbc-essiv:sha256 create ftdata /dev/md4 Enter passphrase: Verify passphrase:

12. mkfs.ext3 -b 4096 -R stride=8 /dev/mapper/ftdata

13. mkdir /ftdata

14. Mount the encrypted volume:
mount -O noatime /dev/mapper/ftdata /ftdata

It mounts successfully this first time. When I cd /ftdata, I can see the lost+found dir

[Code]....

So why is it that I can't mount my encrypted volume after the first time? I am giving the correct password when it asks to.