Internet Sharing Problem PPPoE (plz anyone help me)

I have a desktop (Win 7 Ultimate) with 2 LAN cards and my internet connection through cable is by PPPoE connection. I connect to the internet via dial-up in desktop. I do not have a router but I have a HUB. I am trying to set up internet an connection on "Computer A" and share it to "Computer B" I created a broadband connection (connect me) and checked the check-box in its sharing tab,...