Whenever i plug my keyboard in (its a ps2 plug) i got from my grandparents (e machines) into my computer, both the caps and the num lock light up but the keyboard is not responding. None of the keys do anything what so ever. When i go to Control panel>system>keyboards, it doesnt show up. i dont know what the problem is. Ive tried turning the computer off, unpluging it and plugging it back in. Nothing. Everytime i start it up both caps and num lock come on but again like i said nothing. Help please!!!!