reverse a firmware in a sony dru-510a

[caraloca]

I bought a sony dru-510a to backups my kid's playstation 2 games, well I could'nt do it, I want to add that I did it before with a Hp burner, but I thought it will be better with this dual writer.
Because I could not, I look for a firmware, thinking that it will solve my problem , so I installed the firmware but still I can't do what I want. It is a little better now
All my backups when I play them,they start to load fine, I can see the intro but when I get to the part where it ask to press "start", it freezes there and that's all. before the upgrade I only got to the part where it said PLAYSTATION 2, so there was an improvement.
I tried different media and still the same.
So I would like to start all over again with this burner, that's why I want to put it back as it was when I bought it.
Is there a way I can reverse the firmware?
Or any suggestions?, I don't mind if it records at speed of 1x if like that I can make the backups.

amd 1300mhz. win xp pro, 1024 mb.
programs; alcohol 120%. record now and dvd decripter.
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I searched for an answer for this before , so if it was asked before, sorry about it.

Thank you for your help and time

 

[scarecrow]

Is your console properly chipped/modded? If it isn't, you shouldn't expect your backups to work.

 

[caraloca]

Yes it is properly chipped/modded.
I have made about 25 backups with other burner and they play fine in my ps2.
Thank you for your help.

 

[scarecrow]

Which media are you using? I have the older model (DRU-500a) which really despises certain ones, eg Princo.