Can't complete registration at new site...

I did the first step, got the email and clicked the link in the email. It brought up a page saying I had a one time login, and I click that button and it gives me this error:
You have tried to use a one-time login link that has either been used or is no longer valid. Please request a new one using the form below.
I tried a few times with the same result.
Roy
You have tried to use a one-time login link that has either been used or is no longer valid. Please request a new one using the form below.
I tried a few times with the same result.
Roy
Comments
Ross.
I didn't have a chance to look into duplicating the behavior you observed until last night.
Indeed, you are presented with a one-time login and then you must enter a permanent (until changed) password.
Two ways we can resolve this problem:
1. Can you try the form with a different e-mail address, completing registration?
2. Could you e-mail me the e-mail address you used the first time?
Thank you -