Quicktime Pro - Invalid Registration Code

I copied and pasted both the Username and Registration Code into Quicktime Player 7 Registration window, and still got the invalid registration code message.

Assuming the key is for the correct platform, the copied and pasted name included any salutation and/or suffix used for your account purchase, and the copied and pasted key itself doesn't work, then contact Apple customer support and explain the problem. If the key was generated improperly and doesn't work, then Apple will normally refund your money and have you repurchase the key. While it doesn't happen very often, the key generation program has been know "glitch" on occasion in the past.

ensure there is no extra blank spaces included at the end or begginging of the details you are copying, this often occurs when selecting text.

happened to me: I bought Windows version by mistake!

I called them and get the key for Apple ^,^ Now it's working...