Is wampserver actually running? You typically have to launch C:\wamp\wampmanager.exe (or wherever you installed it) to actually have the web server and MySQL actively running. Not sure how Win8 displays the system tray, but somewhere there will be an icon (like in this image) that shows it is running. (It's red if stopped, and orange/yellow while starting up or restarting; and you can click it for a bunch of useful options.)
PS: Sorry if you already know that, but sometimes it's the simple things that trip us up, so best to check.