Try pressing the C button. {This is the button you WOULD press if it WAS debugged to toggle hyper mode} Other wise it might be a glitch. Try resetting and downloading. Or taking the battery out and replacing it with a new one.
If reset and download doesn't work, you may have to totally reset your tama. Or.. As the person above said, change the battery. That might work. If NONE of that works, you may just have to get a new tama. Hope this helps!