Bluetooth paring problem between IPAD3 and IPHONE 4s

HI friends, i have a problem both of my IPAD 3 and iphone 4s are running on same latest updated OS. But none are showing each other. I kept both near by for more than half an hour still showing DISCOVERING. Can anyone suggest me a solution. I tried setting up airoplane mode and rechecked if at all it could help in anyway. But i dont know what else to do for this. Waiting for your guidance.