Your Web browser is sending a WWW-Authenticate header field that the Web server is not configured to accept.

I was recently setting up Project Professional 2003 to access Project Server 2003. I received the error:

You do not have permission to view this directory or page using the credentials that you supplied because your Web browser is sending a WWW-Authenticate header field that the Web server is not configured to accept.

Project Pro was installed on a server (hey, I was short on machines). I got around the issue by uninstalling the enhanced Internet Explorer security from the server and adding the project server URL as a trusted site. I also had to verify that the permissions associated with trusted sites were set at the default level (low). This allowed me to access the project server from project pro with my domain account.

This should have been easy but was not :)

Project was unable to establish a connection with the selected project server

I got this error when doing a fresh install of Project Server 2003 and Project Pro, after correcting the error in the previous blog entry (here). Both project pro and server were installed on the same machine (I know, but I was short on machines), so the standard issues of network connectivity didn't seem to be a relevant factor in getting the error. After much searching and testing, I finally found the cause:

Project Server 2003 had Service Pack 1 applied to it. Project Pro did not have Service Pack 1 applied to it. When I applied SP1 to project pro, everything worked like a champ. This took me almost a day of searching and testing to figure out the error.

Maybe I'm just slow, but this should have been easy but was not :)