AOPEN 1648 locks up/slows down DVDshrink




I just recently got the Aopen 1648/AAP DVD ROM drive. I installed it as a slave with the NEC3500 burner. Now when i go to open up a disc in Shrink with the AOPEN it will take longer than usual or sometimes cause DVDShrink to say ‘not responding.’
If I get past this part I can select the parts of the DVD I want and then press backup. WHen I press backup it will take a while to bring up the backup option screen. I did not have this problem with the NEC3500. That will bring up the backup screen and not cause any lockups. I need some advice/help on this.

Thanks in advance.