If your write '127.0.0.1' into the browsers address bar, does the WAMP home page display?
If it does, do the following:
Check your hosts file
HOW TO EDIT THE HOSTS FILE The hosts file is protected by windows, in order to save it you must have Administrator privilages. Vista/W7/W8 you may think you are an Administrator BUT YOU ARE NOT.
To successfully save the hosts file do this to launch your editor with Admin Privilages.
Locate your editors icon on the desktop or from the Start menus ( notepad will do if you have nothing else ) left click + shift over your chosen editor icon - will show a menu. select "Run As Administrator" from the menu. Navigate your editor to the c:\windows\system32\drivers\etc\hosts file.
When you have made changes you will now be allowed to save them.