Okay, so I went to my PayPal account again and checked the account overview. There is nothing in my account overview to verify. Sadly, this is the same account which Smashwords uses to pay and it works without any trouble. But your marketplace claims that my account has not been verified. I do know ...

Yes, that is what I've done. Also I've had the PayPal account for more than a year...

I've tried adding my PayPal account to my store listing, but I keep getting an error that my account is not verified. According to PayPal is it verified. I used the correct email, first and last name, but I still get the error. What could be causing this?