Hello,
I am sorry for the delay of this reply.
Em regarding your issue, I tested with Chrome, Safari and Firefox and I cannot replicate your issue. Although i see the mesage asked to accept cookies, but without accepting the cookies, I am still able to login to your site without any issues. Please see
http://screencast.com/t/o6t8aVUTYY
Is your issue resolved? If no, then can you tell me what browser you are using?
Please advise.