I too have been having the same problem as those above. I have been trying to back up my photos from my computer to the NAS. The test connection button always fails, but if I saved the options anyway I could run the backup process but no files would transfer. I tried all sorts of configuration in the path names and adjusted many settings within my Win 7 share options but nothing was working.
I just uninstalled Windows Live Sign In Assistant
(using the windows remove programs feature from control panel), restarted the computer and tried again (without changing any settings within the Frontview).
The backup is now running and I can see files in the backup share folder on the NAS!
I hope this helps some of you out there too, it was driving me mad trying to work out what I was doing wrong.
I have an Ultra 2, Radiator 4.2.20 and Win 7 64 Bit Home Premium