I can't see any of media files in DLNA folders.

[snh21]

Problem Description: I can't see any of media files in DLNA folders.
Troubleshooting Steps: I already cheaked "Enable DLNA server"
Playback Application and version: Client DLNA use bubbleUPNP, windows media player,windows file explorer
Subsonic Version: 4.9.beta3 (build 3772)
Server Version: jetty-6.1.x, java 1.7.0_45, Windows 8 (83.3 MB / 128.3 MB)
Hardware Platform: Windows 8.1
Java Memory Limit: 300MB
Problem Filename: (If you are having difficulty with a particular file, please include it's name)
Output from ffmpeg -i: (If you open a command prompt and type 'ffmpeg -i <filename>' what is the output? Ideally put this in a "code" block)
Last ten log file lines:
INFO MediaScannerService Marking non-present files.
INFO MediaScannerService Marking non-present artists.
INFO MediaScannerService Marking non-present albums.
INFO MediaScannerService Completed media library scan.
INFO PlaylistService Starting playlist import.
INFO PlaylistService Completed playlist import.
INFO PlaylistService Starting playlist statistics update.
INFO PlaylistService Completed playlist statistics update.
INFO MediaScannerService Automatic media library scanning scheduled to run every 1 day(s), starting at Fri Jan 03 04:00:00 KST 2014
INFO FolderBasedContentDirectory UPnP request - objectId: 0, browseFlag: BrowseDirectChildren, filter: *, firstResult: 0, maxResults: 16


I can see DLNA playlist but I can't see any of media files in DLNA folders.
English is my second language, so please excuse any English mistakes.