You may do some troubleshooting steps by considering these points:
When I try to log in, I'm redirected to the login page again without any error message. What should I do to log in?
This problem may occur if cookies are disabled in your browser or if cookies from Freelancer.com are being blocked by your browser security settings. Please check your browser security settings and refer to the browser help files if necessary to resolve the issue.
Why am I not getting emails such as new project notifications?
Some of the larger email providers such as gmail, yahoo, msn, live and hotmail sometimes rate limit us due to the high number of users we have on our site. Try whitelisting us in your mail account. Tips for Gmail.