Hi,
Is this installation using a Version 4.0 license that you requested, or did you install using your existing 3.0 License?
Your access log located [install-dir]/logs should verify if the Engine is actually running or not. Sometimes the service appears to start at the OS level
but the Engine process doesn’t necessarily keep running, especially if there’s a license problem.
The upgrade process is given on this page.
You can also get a free Trial license here to try it out, prior to upgrading.
Daren