I'm so sorry. You should check the quail section and see what other member's experiences has been. Maybe it'll help you figure out what went wrong with this hatch I hope your little one will be o.k. and grow up.
I've never hatched quail or anything but chickens, so I don't know if you have to do anything different. So I can't help. I've got some fantastic poultry/home farm books here, but they just have chapter after chapter on chickens, ducks and geese. The only thing I can think off is maybe the incubator conditions wasn't right or they came from weak parent stock. Or it could be one of 10 other causes. Either way, it sucks.