If you are having trouble logging into the new site, and you were registered on the old forum, you will need to click on the "Forgot your password" link to have a new password sent to the e-mail address you used when you registered on the forum.  If your e-mail provider has a junk mail filter, you may want to add This e-mail address is being protected from spambots. You need JavaScript enabled to view it to your filter list, before you make the request.  If you already have made the request, and forgotten to add the address to the junk mail filter, then you may find the e-mail in your Junk Mail or Spam folder.