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{bgcolor:E6E6FA} h3. Troubleshooting Login Problems {bgcolor}
If you get an Access Denied message, complete and send the email form so a member of the class faculty can add you to the class/section Participants list. You should then receive a response from the instructor.
*For MIT Users:*
If you are on the Participants list and still cannot gain access, consider the following:
* Do you have an MIT certificate? To use a Stellar class website, you need both an MIT Certificate Authority and a personal certificate.
All personal certificates at MIT expire on July 31. Go to [Certificates at MIT|http://web.mit.edu/is/topics/certificates/index.html] for directions on checking the expiration date of certificates, deleting expired certificates in your browser, and getting a new personal certificate or MIT CA certificate.
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* Try clicking the Login button on the class or section homepage, then click a link in the homepage's navigation bar. If clicking the link takes you to another page, you are logged in.
*Note:* Users with a non-MIT account are prompted to enter a user name and password after clicking the Login button.
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* Try logging in to another certificate-protected site, such as WebSIS. If this works, then the problem is in Stellar. If it does not work, the problem is in the particular computer/browser/certificate combination you are using. Make sure that your computer and browser have only current MIT certificates---delete any old ones.
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* Make sure you are using an [MIT-supported web browser|http://web.mit.edu/ist/topics/browsers/].
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* If all attempts fail, contact the [Computing Help Desk|http://web.mit.edu/ist/helpdesk/index.html].
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*For non-MIT users*
If you are on the participants list, consider the following:
* Is the e-mail address you are using to login the same as the one the instructor listed as your e-mail address on the site? Check with the instructor.
* If this is not the problem, contact the [Computing Help Desk|http://web.mit.edu/ist/helpdesk/index.html].
{bgcolor:E6E6FA} h3. Stellar Login via MIT Touchstone {bgcolor}
{bgcolor:E6E6FA} h3. MIT Certificates {bgcolor}
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