No unique identifier was found.

This error is typical occurred when you click on the link from the first message you have receive when you begin the registration process. If true then you must control that your e-mail program not has split the long link in the message in two lines. In the URL you will see this text "&UniqId=" and after that en long random of numbers and characters.

Make sure that there are 32 characters, if not then some is missing and will probably be on the next line in the message. The complete URL can look like this:

http://www.mods.dk/member.php?action=12&UserId=118577&UniqId=b4f417d51307935435d2a4cab2a4a3fd.

Note:
The text and numbers in bold should be 32 character long.