NEC3500A Error message in DVD decryptor

I am trying to use DVD decryptor and i keep receiving this error message in the program. What ius the problem and how can I correct it?

thanks

I/O Error
Device: [1:1:0]_NEC DVD_RW ND- 3500AG 2.19 (E:)(ATA)
ScsiStatus: 0x02
Interpretation: Check Condition
CDB A4 00 00 00 57 5D 00 00 00 0C C4 00
Interpretation Report Key- Title Key (3)