i have a hitachi 60gb ata100 hd which has xp pro on it it works fine in my pc ,but when i put it in my old pc it does not show up in the bios this pc has a packard bell mediablaster 2 mb ,p3 500 mhz ,384 dram ,the bios is an amibios american megatrends,bios version is 1998 ,it has ata33 compatabillity. when pc is switched on nothing ,on entering bios setup no hard drive(jumpers are set to master) when setting jumpers to 32gb limit and rebooting windows safe mode screen appears ,selecting safe mode windows halts on the last line ending agp.440. is this hard drive to new for this old pc?. the original hard drive suffered a mechanical failure but it was running xp pro fine (if a little slow) for 2 years. any ideas?