Android Question Async Socket does not read all data

Hi. I am reading a socket, if the socket data is small (1000 bytes) it works fien, if th socket size is larger (6000 bytes) it does not read al the socket's data.
my code is
Sub EnviarMensaje(mensaje As String)
Smensaje=mensaje
If socketclose==False Then
sockete.Close
'AStreams.Close
End If
socketclose=False
sockete.Initialize("sockete")
sockete.Connect(Sip,Spuerto,8000)
End Sub

'prueba con sokets
Sub AStreams_Error
ToastMessageShow(LastException.Message, True)
End Sub

Sub AStreams_NewData (buffer() As Byte)
Dim bf As Int
Dim msg As String=""
Dim lm As Int
msg = BytesToString(buffer, 0, buffer.Length,"UTF8")
Msgbox(msg,"ok")
'Mgbox(msg,"Retorno")

bf=buffer.Length