Additional Hard Drive Probs, please help!

Hi
I have an Athlon 2600+ running xp with 1gig ram and a hitachi sata 80gig harddrive.
I have a new seagate 200 gig sata to add.
Once all plugged in I boot the pc & it gets to the windows logo with black background before rebooting itself!
I went into bios and tried auto detecting yet it didnt seem to make a dif.
What am I doing wrong?
Sorry for my ignorance.
Im sure its a simple procedure Im making difficult somehow.

 

some system information such as Motherboard and such would help.

 

Thanks
How do I find out what the motherboard is for you?
What else do you need?

 

well you can open the pc and read the manufacturer and model number off the motherboard or you can go D/L Everest Home and run that as it will usually give you correct info.

 

Thanks, I will do this as soon as I get home and post for you, is it just the motherboard manu & model number you need?