Okay, to clarify I didn't upgrade to 4.0, I did a clean install on a new server.
Due to database corruption in the original lansweeper database I could not migrate to the new server, had to do a clean install.
Install is complete, and my Lansweeper Web Console says Page Cannot Be Displayed. I'm sure there is a real simple solution that I'm missing. IIS is running. Can anyone help, thanks.