How can I get my iPad 2 to view a website on a laptop over an adhoc network?

I have setup a laptop with iis and have a test website running on it. I have created an adhoc network between my laptop (running Windows 7) and my Ipad 2. On the laptop I can enter a url in firefox and it knows it is a local site, by entering details of this into the hosts file. When I try to enter the url into the browser on the Ipad 2, I get a message of: Safari cannot open the page because it is not connected to the internet. Any suggestions on how I can get this to work? Many thanks.