200GB Hard Disk Size incorrect / unable to access

Hello,
I was initially using Maxtor 6Y200P0 (200 GB) as Slave - I had two partitions in it (both NTFS). I had for some reason to format my Master Hard Drive a seprate HD (WD 100GB) and when I booted up - the slave (Maxtor HD) in the Disk Manager shows nothing in the Partition type column and the size as 128 GB Healthy and active and 61.9GB as unallocated. - This is a disk in which I had tons of stuff and I could access the full capacity of 200 GB and now it is showing me only this - I have created the new master HD (WD 100GB) with Windows XP profession with SP1 (I have also run big_drive_enabler.exe which sets EnbaleLBA registry entry to 1 handle the HD limit )and I have also used MAxBlaster 3 - and I am still unable to see my data and in the explorer it is showing only one drive (128 GB) and when I click on it , the msg I get is "The disk in drive (drive letter) is not formatted do you want to format it now. when I run the MaxBlaster3 software during Boot time and look up this disk it shows the Volume name as some garbage and the size as 137.4 GB. During Boot up when I go to the BIOS setup it shows two HD correctly and the maxtor one does show as 203 GB.

My Current PC Spec

Dell Dimension 4550

BIOS A03

Any suggestion, If the BIOS is able to see 203 GB does it mean that I don't need to do a BIOSFLASH or it would be helpful to download and try the latest BIOSFLASH

Please let me know if you have any other suggestions ? - I have been breaking my head and surfing non-stop for the past 48 hrs :robotsad:

Can anyone suggest me how I can get back my data.

Thanks