It seems like you’ve run Apache at your PC locally, started it and published your application in Designer mode (menu Administration – Publishing on Web Server…). When publishing you should fill some fields in the Publish on Web Server dialog box. One of those fields is Name (the name of the folder on the site). The other field is Directory (the full directory path including the application folder). I’m using the same Name and the application folder values. So this value you should specify when trying to open the Web Client.
For example:
localhost/MyApplication – for the locally opened web browser.
http://<IP-address-of-your-machine>/MyApplication - for the web browser
Note to unblock 80 port in your firewall