Issue about copy protection

Hello to all cdfreaks members:)

I try to copy one of my Pc DVD-Rom(which quality nearly worn out) by using Nero Express 6.Unfortunately at the end of burning process this error pop up “Unrecoverable read error”.I try to explore why that error happen.Then i discover that my Pc DVD-Rom have this protection Alpha-DPS info about this product can be by clicking this link how can solve this matter?