How to run Socket.io behind Amazon ELB?

Merry Xmas everyone,

I'm developing a real-time system (like a chat application)

(http://ift.tt/Nn8miJ)

I have the problem when run this behind Amazon ELB, it can't keep data when refresh page.

Would anyone help me how to config Socket.io behind Amazon ELB?

Thanks and best regards,

Samuel Wilsone