loging out of site if navigatinhg to other pages in ruby on rails app

[Sailatha Kashamoni]

I have an issue when i am loging in to site after clicking on other menu tabs it is automatically loging out and if i wait for few minutes refresh and then login tabs are working fine.If i logout and login again and i click on other tabs geting loged out. I am not understanding where i need to check the code.

class SessionsController < Devise::SessionsController

  # POST /resource/sign_in

  def create    

    respond_to do |format|

      format.json do

        self.resource = warden.authenticate!(auth_options)

        sign_in(resource_name, resource)

        return render :json => resource

      end

      format.html do

        super

      end

    end

  end  

end