Unreal 2 is kick'in my butt!!!

[Sixx2]

I used blindwrite suite to read to image, used the BWA to get physical info and burned with blind write. It copied the disks successfuly and the game installs fine from the back-up.

Here's what I cant figure out:

on one machine I installed from original and can play the game using the BU play disk. (passing the secur rom check)

on another machine I installed from BU successfully but the game wont run from the BU play disk. but will run from the original.

Confused yet?

The only difference between the 2 machines I can see is the first has a LG 52X Rom (not cdrw) I was running from.

The second machine has a DVD Rom.

I know Secur rom disks cant be used in cdrw's because they can see more. Is this the case with DVD drives also?

I'm stuck!!!