I noticed this same question had been brought up before, and it looks like it was never resolved...
When Backup Assistant says my PIN is wrong, I choose to retrieve my PIN. It then says to go to "http://www.verizonwireless.com/backupassistant" and click on "View PIN."
I must be blind, because I have no idea how to find "View PIN" and I hope somebody can help!
Thank you so much 