You are running the GUI from a Windows machine, yes? Are you logged in to that Windows machine with a local machine account or a domain login? The latter is what I'm referring to as an AD account. So what credentials did you use to login to your Windows machine?
Check your DP userlist file. Do you see a DP user with those AD credentials listed? If not, please add an entry for such.
If you have further issues, please open a support case with the Response Center. Thanks.
