One possible reason is the website bindings.
- Open "Internet Information Services (IIS) Manager"
- Open the "Default Web Site"
- Open the web application "dbFront"
- Look at the list of URLs that you can use to browse the web site.
If "localhost" is not included in the list then you need to add it to the bindings.
- Open "Internet Information Services (IIS) Manager"
- Right-click "Default Web Site"
- Click on "Edit Bindings"
- Add an entry for Type="HTTP", Hostname = "localhost", Port=80