As of January 23rd 2005, all BT's are disable for unregistered user, so please sign up. It's only a 3 minutes process. Here is an advice, if you don't receive a email from baka-updates:
1) you mispelled your email i.e. missing the .com or .net from the email address.
2) your email client treats the email as junk mail, it's probably on your junk mail folder.
If these still doesn't help, you can go post your problem in the technical problem section or email one of the Baka-Updates staffs.