Do you have a Roku-Soudnbridge, or a Pinnacle branded one ?
Sounds like yours is a Pinnacle. Pinnacles wont connect to iTunes, or firefly’s DAAP share (essentialy iTunes clone).
Instead, you need to activate the RSP plugin in firefly.
Try to download the latest firefly off here:
nightlies.mt-daapd.org
That the database isnt accessible isnt all too good, but if it worked then, so what?
Can you access firefly through its webpage ?
http://localhost:9999 iirc.