RTMP chunk 0 error

[aliasdoc]

Hi,

When i start my session, it close unexpectedly, can someone explain me what is the problem, debug lines:

Handle message:4
Received ping, sending pong.
Steam in buffer size:37
First byte:0x43, header type:1
Handle message:20
Received invoke
Received invoke _result
Find command: createStream for ID:4
Tracking command(5, publish)
ClientState: 8
send pong
Want read:4096, read:173
Steam in buffer size:173
First byte:0x3, header type:0
Handle message:20
Received invoke
Received invoke onStatus
code : NetStream.Publish.Start
send header packet
ClientState: 9
Steam in buffer size:1
First byte:0x9, header type:0
Not enough a header
RTMPChunk_0:
09 
PreallocBuffer begin:0x1359aa600, writer:0x1359aa6ad(3923), reader:0x1359aa6ac(1)
send set chunk size:16384
Want read:3923, read:0
Read from stream error:0
ClientState: 11
~RTMPSession

thanks.