I just purchased and installed an Acer CRW 1208A and keep getting an "unexpected" error. I have another CD drive set as master and the Acer as slave. I just replaced the new Acer where my HP 8100 was. Would I have to set something differently since the Acer is a E-IDE/ATAPI interface. I am not familar with ATAPI. I am about ready to take it back and go back with HP.