It looks like you have disabled my plugin so I cannot test it on your site. The error you got was a “No Session” error, which means that your server was not maintaining a persistant session thoughout your login attempts. I can’t tell you why your sessions are not working without access to your site but I can see that you are also using All-in-One WordPress Security maybe there was a conflict with that plugin’s login page additions, I will test that plugin on my site. Which of the two plugins did you install first? and What was the last change you made to you security or serv setting before you started having this problem?