This relates to a possible problem in the EVA Evaluation install where the URL is not updated to the local machines name after install.
You may see
http://inspired8:6464/ABTWSAC.EXE/Archie
instead of
http://{yourmachinename}:6464/ABTWSAC.EXE/Archie

This is a problem that stems from the way the installer assigns the machine name. The installer makes use of a Javascript to edit the database and change the machine name to your local machine. This process fails if the default handler for Javascripts has changed by windows or some other 3rd party application.

To check this click on "START" and click on "RUN". Type "CMD" and click "OK"
In the dos box that comes up type:

ASSOC .js

It should show something like ".js=JSFile" on a working system. If it shows something else, note what it is for safekeeping and then change it by typing

ASSOC .JS=JSFile

Verify the change using "ASSOC .JS" again.
It should now show:

.JS=JSFile

Close the dos window and reinstall the EVA Netmodeler Evaluation version. It should now set up the correct URL.