Jquery-Datatable-Rails Gem: Error on Update. PUT request automatically converting to a POST request.

Please checkout this link and help me out here. I guess the Gem has a Bug.

It is working perfectly for Creating a User but while Editing User information it is giving a routing error:

No route matches [POST] "/users/2"

Here is the link:
http://stackoverflow.com/questions/16501440/jquery-datatables-rails-gem-not-working-for-update-call-converting-put-request