Please check whether the followings are correctly set on the computer you are using:

• Is the clock on the computer correctly set?
  Please set the date, month and year correctly.
• Is your browser set to allow cookies to be saved?
  Please change the browser setting to allow cookies.
• Are you behind a firewall?
  In the firewall settings, please unblock cookies.

The following procedures should help solve the log in problem.

• Delete the cookies saved by the browser.
• Delete the cache files saved in your computer.