Having problems backing up with dvd decryp

as the title states Iam having problems backing up one of my new dvds, the error Iam getting is shown in the picture, I am getting the error in dvd decrypter 3.4.5.0I have tried to use iso and files keep getting the same error

can anyone help please?

Thanks
nfixit@gmail.com

Seems like there is an error on the disc. Try wiping the back of the disc, also tyr putting it in another drive if you ave one. or try a friends if you can