Linksys Wireless Router :: Cannot Connect Wifi Devices To Ea6500

To preface this message I need to state that I am functionally illiterate when it comes to any kind of networking. I just replaced an old Linksys wireless-G router with a new Linksys EA6500 router.  My needs are as follows: I am connecting 4 desktop computers (two personal and two business) via Ethernet cables.  In addition there will be three smart phones, two DVD players and one game console connected wirelessly.  In the future I will add a printer, hard drive and more wireless devices.  After installing the hardware and running the setup disk all four computers wired with Ethernet cables worked fine (although they are not set up to communicate or share files with one another - they only need to access the internet.  My problem is with the wireless connectivity.  I cannot get any one of the wireless devices to work.