vlc rtp stream fail

qt4 debug: MRL passed to the Sout: file:///E:/DLNA_Media/audio_test/1_48K.wav
qt4 debug: Adding option: file-caching=300
qt4 debug: Adding option: :sout=#duplicate{dst=rtp{dst=192.168.1.252,port=8554,ttl=1}}
qt4 debug: Adding option: sout-keep
main debug: adding item `Streaming' ( file:///E:/DLNA_Media/audio_test/1_48K.wav )
qt4 debug: Adding a new MRL to recent ones: file:///E:/DLNA_Media/audio_test/1_48K.wav
main debug: rebuilding array of current - root 播放清單
main debug: rebuild done - 1 items, index -1
main debug: processing request item: Streaming, node: null, skip: 0
main debug: resyncing on Streaming
main debug: Streaming is at 0
main debug: starting playback of the new playlist item
main debug: resyncing on Streaming
main debug: Streaming is at 0
main debug: creating new input thread
main debug: Creating an input for 'Streaming'
main debug: using sout chain=`duplicate{dst=rtp{dst=192.168.1.252,port=8554,ttl=1}}'
main debug: stream=`duplicate'
main debug: looking for sout stream module: 1 candidate
qt4 debug: IM: Setting an input
main debug: Creating an input for 'Streaming'
main debug: meta ok for (null), need to fetch art
stream_out_duplicate debug: creating 'duplicate'
stream_out_duplicate debug:  * adding `rtp{dst=192.168.1.252,port=8554,ttl=1}'
main debug: stream=`rtp'
main debug: looking for sout stream module: 1 candidate
main debug: set config option: sout-rtp-dst to 192.168.1.252
main debug: set config option: sout-rtp-port to 8554
main debug: set config option: sout-rtp-ttl to 1
main debug: using sout stream module "stream_out_rtp"
main debug: TIMER module_need() : 0.582 ms - Total 0.582 ms / 1 intvls (Avg 0.582 ms)
main debug: using sout stream module "stream_out_duplicate"
main debug: TIMER module_need() : 37.205 ms - Total 37.205 ms / 1 intvls (Avg 37.205 ms)
main debug: using timeshift granularity of 50 MiB, in path 'C:\Users\Brad\AppData\Local\Temp'
main debug: `file:///E:/DLNA_Media/audio_test/1_48K.wav' gives access `file' demux `' path `/E:/DLNA_Media/audio_test/1_48K.wav'
main debug: creating demux: access='file' demux='' location='/E:/DLNA_Media/audio_test/1_48K.wav' file='E:\DLNA_Media\audio_test\1_48K.wav'
main debug: looking for access_demux module: 3 candidates
main debug: no access_demux module matching "file" could be loaded
main debug: TIMER module_need() : 0.232 ms - Total 0.232 ms / 1 intvls (Avg 0.232 ms)
main debug: creating access 'file' location='/E:/DLNA_Media/audio_test/1_48K.wav', path='E:\DLNA_Media\audio_test\1_48K.wav'
main debug: looking for access module: 3 candidates
filesystem debug: opening file `E:\DLNA_Media\audio_test\1_48K.wav'
main debug: using access module "filesystem"
main debug: TIMER module_need() : 0.181 ms - Total 0.181 ms / 1 intvls (Avg 0.181 ms)
main debug: Using stream method for AStream*
main debug: starting pre-buffering
main error: cannot pre fill buffer
main warning: cannot create a stream_t from access
main debug: removing module "filesystem"
main debug: dead input
main debug: changing item without a request (current 0/1)
main debug: nothing to play
main debug: looking for meta fetcher module: 1 candidate
lua debug: Trying Lua scripts in C:\Users\Brad\AppData\Roaming\vlc\lua\meta\fetcher
lua debug: Trying Lua scripts in C:\Program Files\VideoLAN\VLC\lua\meta\fetcher
lua debug: Trying Lua playlist script C:\Program Files\VideoLAN\VLC\lua\meta\fetcher\tvrage.luac
main debug: using meta fetcher module "lua"
main debug: TIMER module_need() : 0.840 ms - Total 0.840 ms / 1 intvls (Avg 0.840 ms)
main debug: removing module "lua"
main debug: searching art for Streaming
main debug: looking for art finder module: 2 candidates
main debug: using art finder module "folder"
main debug: TIMER module_need() : 0.368 ms - Total 0.368 ms / 1 intvls (Avg 0.368 ms)
main debug: removing module "folder"
main debug: Album art is local file, no need to cache
main debug: found art for Streaming in cache
qt4 debug: IM: Deleting the input
main debug: TIMER input launching for 'Streaming' : 59.976 ms - Total 59.976 ms / 1 intvls (Avg 59.976 ms)