I just installed FireFly on windows box as well and I get the same. My mp3 source sits on a linux server that I reach with mapped drive and can see in explorer no problem.
When running in debug mode the songs are added (it shows in the debug console and on the web interface) – when I run in normal mode the scan starts and adds nothing. The log file is not very helpful either:
2008-09-19 09:20:13 (a90cca6f): Rescanning database
2008-09-19 09:20:13 (a90cca6f): Starting playlist scan
2008-09-19 09:20:13 (a90cca6f): Updating playlists
2008-09-19 09:20:13 (a90cca6f): Scanned 0 songs (was 0) in 0 seconds
Help anyone?