I just built a new system using the hard drives, cd burner & dvd rom from my old system. It's a 3.2Ghz P4 on a PC Chips P23G motherboard. I have 1 GB ddr2 memory. I also installed a 250GB SATA hard drive. Everything works fine, except the cd burner. When I boot up, it hangs in the BIOS saying the slave drive is not ATAPI compatable. I know that it is, and it even says it is right on the label on the bottom of the unit. The bios is not detecting the drive when it's installed. I've tried making it the master & I've tried to run it alone, but nothing works. When I tried to boot with it unhooked, the same message still popped up. I had to go into the BIOS & select "not installed" under secondary slave to make it stop. It's a HP 9100 cd r/w. I know windows 98 had some issues about not being able to "see" more than 4 devices. Is this still an issue under XP home? I have 2 parallel ATA hard drives, the SATA, a DVD rom, & am trying to run this CD R/W as well. I have a 550 watt power supply which more than enough taps for everything (although I know that just because you can plug it in, doesn't mean you should). Any insight to this problem is greatly appreciated.