For the sake of asking, when you say you lost your CD key three times.
Are you saying that......
You have lost all three of the StarCraft original CD cases, that the labels were attached to?
You peeled the CD key off all three cases, and lost them?
Or, were you a bad boy, and Bnet has black listed you for some reason?
If it's the first two reason purchase StarCraft # four, and write the number on the CD with a permanent marker.
If it's the last reason, I would suggest looking within one's self for personal improvement.
Not that I'm implying anything mind you, I am assuming it's one of the first two reasons, until you say otherwise.