I don't know if I did my first purchase right!

Okay, I used the voucher on the BTTF Blu-Ray thing to get the first episode for free. When I enter the code (121GIGAWATTS) it kept disappearing. I don't know if I did it right and got it free! HELP!!

EDIT: Never mind. I just got an email saying I didn't pay one red cent for it. Thank you, forces of Gmail!
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