Click "create new account" in the sidebar. Or click here. You will be asked to confirm your email address before access is granted. Be sure to correctly select whether you are presenting a paper at this conference.
From the forum find your paper. Two tabs appear at the top, select "edit". You will be presented with a form where you will be asked to fill in an abstract, as well as the opportunity to upload your paper, along with any other additional files.
Once a file is uploaded you can fill out a description of the file in the text area that appears.
Please email the administrator if you have any difficulties or questions.