Are domain credentials needed to access the site on the PC?

>Hi,
>
>I am trying to connect (load main page) an asp.net application running on one computer on a wi-fi network from iPad.
>
>Some background information. I can access this asp.net app from another PC in the office (entering in the browser http://PcServerName/AppName/MainPage.aspx) This works. The PCs as well as iPad use the same router. In fact if I enter in the Safari on iPad address 192.168.0.1 I get the login screen to the router. But when I enter in iPad address I get message that the server cannot be found.
>
>Does the above mean that something is not setup on iPad or on the PC hosting the application?
>
>TIA.