If I use the ID and access key from Jun 22nd, the most recent I appear to have, it tells me I either have the wrong ID or Key. If I attempt register with that email it tells me, "Server error. Please try again in a few minutes. If the problem persists, please report it on the forum." It has been 18+ hours, so I believe I have fulfilled both the try again later and report on forum requirements.
If you want to check your logs, you should see an access attempt at approx 0920 GMT+1 (which is local to you Tom, IIRC) failing for user ID 26 and then a failing attempt to register with me email address. I also sent you the email with ID and key from the address I was trying to use Tom.