Look in your Trash/SPAM folder. Some servers authomatically classify the message as SPAM.
Make sure that the link is whole. Some mail readers break it on two lines. In this case, copy and paste the two parts of the link in your browser without space inbetween.
After registration you will find a link in your profile to change the style of the site. Try the alternative style. If you do not like it, use the same link to revert to the default style.