Cannot serve a SHN file to my Roku Soundbridge

I am running the version of Firefly I downloaded from http://www.rokulabs.com/downloads/sb_and_sbr_support_downloads/FireflySetup.exe on a Windows XP SP2 machine with all the latest windows update patches installed.

I cannot get it to serve my SoundBridge a SHN file. I have had no trouble with other formats (including FLAC, which required me to add that extension using the configuration utility.) I reduced the test case down to a library consisting of a single directory containing about 10 SHN files. Here’s what my config file looks like, after stripping out all the comments:

[general]

web_root = C:Program FilesFirefly Media Serveradmin-root

port =9999

admin_pw = firefly

db_type = sqlite

db_parms = C:Program FilesFirefly Media Server

mp3_dir =E:Flac Music

servername =Firefly Media Server

runas = nobody

extensions = .mp3,.m4a,.m4p,.wma,.flac,.shn,.wav

rescan_interval = 600

always_scan = 1

process_m3u = 1

scan_type = 2

truncate = 1

logfile = firefly.log

password =



[plugins]

plugin_dir = C:Program FilesFirefly Media Serverplugins

plugins = rsp.dll,w32-event.dll,ssc-ffmpeg.dll,ssc-wma.dll

I realize SHN is a bit limited as a format in that it carries no metadata, but I did see a another SHN question on the forum (about outboard metadata), so I’m wondering what I need to do to get Firefly to serve it to the Roku properly.