First of all, I'm not your "bro". Was the sound working before the reformat? If so you either missed those drivers, or installed the wrong ones. Like kchi55 we could help you more if we knew more about your computer.
It worked before i even reformatted. I put the sound blaster in the CD rom. But it says i dont use that kind of driver. i dnt have the CD for the sound card i use now.