same problem over here, and i had never used that option
Problems with logging in and playing live chess

try this link: http://www.chess.com/clear_cookies.html
and then login again.
let us know if you still have issues!
try this link: http://www.chess.com/clear_cookies.html
and then login again.
let us know if you still have issues!
If you're still having problems, can you please use this thread
http://www.chess.com/forum/view/help-support/log-in-issues?lc=1#last_comment