Try using File -> Options and set it to automatically log in using the Username and Password you enter.
Does that work for you?
I can't automatically do that to the file I'm downloading from. It's accessed by a variety of people who need to use different accounts to access it. Guest access is open on the file.
I've tried logging into the updater several ways automatically - as a guest with admin privileges and with an account identical to the admin acct's login/password. I'm still prompted for a username/password when the script hits the import step.
I've even tried opening the file with a script prior to running the import script step. It still prompts me for a login/pass. Very annoying.