Samsung P2 - partial unbrick

My P2 is loscked and when i do the tasks as stated to unbrick like on other sites it works to a point.
Using the FWDN.exe
I open FWDN and point to the ROM file, check the correct SDRAM etc.
When I do the power on it writes to the SDRAM but then has a warning:
[warning] Device INT: Send CDM fail
The only option is to click OK so I do and it
Message:
TARGET DEVICE INFORMATION ---------
Device Type : NAND Drive
Device Serial Number Type : SN_NOT_EXIST
Device Serial Number : NOT EXIST
Device Hidden Size : -1 pages
Device SDRAM Configuration Value : 0x22E92010

I click on WRITE and
[INFO] Rom file consists of 1 number of images
[INFO] Image No.1 : 3907272 bytes, Default Target

[INFO] START of Writing Image No. 1
[ERROR] CFWDNDlg::OnBnClickedBtnWriteFirmware : ô’B
Device Removed
and a message box - Writing failed
............
The P2 is then recognised by my PC but there are no files in it.

The P2 has a message that says:
"Please Image Update!
Update STR file.
Update AUI file.
Please connect to USB and update Resource File.


What am I doing wrong??
It is so frustrating