Sorry, but you are not listed as a staff member or student in 6.02.

If you've clicked cancel when the browser asks which certificate to use, it caches the answer and never asks again. If you're using Firefox, try going to Preferences -> Advanced -> Encryption and choose "Select one automatically" -- that usually fixes the problem.

If that's not the issue, please contact 6.02-web@mit.edu if you need access to this webpage and include the following two lines:

 SSL_CLIENT_S_DN_CN: ???
      SSL_CLIENT_S_DN_Email: ???