Glen, I was able to get my Flow working by going into the "Connection" and changing the way I input my credentials using the following:
Root folder = c:\
Authentication Type = Windows
Username = <domain name>\<your user name>
**** make sure your domain name is the same one you use to log into your LAN\WAN. This is not your web domain
Password = <your domain password>
Gateway = <the name of the gateway you set-up>
Once you have your connection set-up you should be able to click on the image the folder on your "File System" action and then select "Temp" or whatever.
I hope that helps! My hangup was on the domain name. I was using my webdomain and not the domain used for AD.