If after trying to log in you are redirected back to the signup page, this is a cookie issue. The most likely issues are usually either your cookies are not enabled, that you have conflicting member/guest cookies, or that you have a program installed that is prohibiting our cookies for being stored.
First, make sure that your cookies are enabled in your web browser:
If your cookies are enabled and you are still being redirected to the signup page, then you most likely have conflicting guest/member cookies. In this case we suggest clearing your browser's cache/temporary internet files completely:
NOTE: When reaching Step 2, make sure that you ONLY have a check next to Cookies and Cache.
If you have already done the above and still cannot access, then the most likely issue is that your computer's personal security (such as a firewall, pop-up blocker, etc) is causing the trouble. Please try disabling your security and logging in again to see if this is the cause. If so, contact your security system's manufacturer for information on resolving the conflict.