Configure small asp.net 4.0 site to run on IIS7 Windows Server 2008

I have my own Windows Server 2008 running a few websites. However I'm having a little difficulty getting a new site running even though it's the same as others I have on the server. Maybe a mental block on my part! Essentially the problem is that even though the path is set to C:/inetpub/wwwroot/myapp in all suitable places, when I try to view it on the web it seems to default to C:\inetpub\wwwroot. By explicitly putting the directory in the URL I can get to the index page, but that's not how it should be. Prompt assistance required as this site need to be running. It could be a very quick task for an experienced person. RDC available for accessing.