Neo 2.5 DVD-Key PS2 DVD Backup booting problem

[sentzless]

Let me start out by saying I am a newbie...see post number

I have installed a Neo 2.5 DVD mod chip in my PS2 Version 4. I am able to play PSX originals, PSX backups and PS2 originals. I am having a problem with PS2 DVD Backups.

I am using a GS2 version 1.93

Here is my problem:

a. I press the reset until both lights are flashing
b. the GS2 menu appears and the GS ejects
c. Replace GS2 with PS2 DVD original (grand Theft auto III)
d. I press "start game" then "without codes"
e. At this point I expect the tray to open but all that happens is the blue light flashes.

I am stumped...any help would be greatly appreciated!

sentzless