It sounds like you may be trying to access your server from another PC.
If this is the case, run wamp manager -> Put online
By default wamp configures apache to only allow access from ip address 127.0.0.1, when you Put Online it will allow access from THE WORLD.
------- Original state ------ # onlineoffline tag - don't remove Order Deny,Allow Deny from all Allow from 127.0.0.1 So that the server can only be accessed from the machine it is running on.
---- after Put Online ------- When you put it online it changes this to Order Allow, Deny Allow from all
You may want to manually change that after wamp has made its change to something like Allow from 192.168.1 or whatever your subnet is.