Symptom

Using PROJECT in a box Personal Version with the Personal Web Server you get the message on login:

The underlying connection was closed: An unexpected error occurred on a receive.

Solution

Try replacing the url:

http://localhost:8080/piabws/piabws.asmx

with

http://127.0.0.1:8080/piabws/piabws.asmx

Further Solution

Edit the file c:\windows\system32\drivers\etc\hosts

If the line is present:

::1 localhost

…then comment it out.