PrepareToEncode Encoder SDK (push server) failed???

[Crisco www.misericordia.com.br]

Hi

I m working on WEBRADIO Software. im using Windows media encoder 9 SDK
on Windows 2003 server using VB.NET.
My current scenario is my soundcard . My application will push my
server the live audio on specific port.

I am using Windows media encoder sdk sample (entire code), currently i
am facing problem in "PrepareToEncod e" (Number Error: 0XC00D2F0C),
entire code is given below:
'============== =============== =======

Imports WMEncoderLib
Public Class Form1
' Declare variables.
Dim WithEvents Encoder As WMEncoder
Dim SrcGrpColl As IWMEncSourceGro upCollection
Dim SrcGrp As IWMEncSourceGro up2
Dim SrcAud As IWMEncAudioSour ce
Dim SrcVid As IWMEncVideoSour ce
Dim ProColl As IWMEncProfileCo llection
Dim Pro As IWMEncProfile
Dim PushDist As IWMEncPushDistr ibution
Dim strServerName As String
Dim strPubPoint As String
Dim strPubTemplate As String
Dim MyNSCFile As String
Dim MyNSCURL As String
Dim MyASXFile As String
Private Function Encoder_OnAcqui reCredentials(B yVal strRealm As
String, ByVal strSite As String, ByVal varUser As Object, ByVal
varPassword As Object, ByVal lngFlags As Long) As Boolean
'strRealm = ""
'strSite = "media.site.com .br"
varUser = "admin"
varPassword = "statesecre t"
lngFlags = 2
'MsgBox("Creden ciais")
End Function

Private Sub Button1_Click(B yVal sender As System.Object, ByVal e As
System.EventArg s) Handles Button1.Click
' Generate the announcement file.
PushDist.Genera teMulticastInfo File(MyNSCFile)
PushDist.Genera teAnnouncementF ile(MyNSCURL, MyASXFile)

' Start encoding.
Encoder.Start()
MsgBox("Click OK to stop broadcasting.")
Encoder.Stop()
End Sub

Private Sub Form1_Load(ByVa l sender As System.Object, ByVal e As
System.EventArg s) Handles MyBase.Load
' Create a WMEncoder object.
Encoder = New WMEncoder

' Retrieve the source group collection and add sources.
' Use the default devices for the audio and video sources.
SrcGrpColl = Encoder.SourceG roupCollection
SrcGrp = SrcGrpColl.Add( "SG_1")
SrcAud = SrcGrp.AddSourc e(WMENC_SOURCE_ TYPE.WMENC_AUDI O)
SrcVid = SrcGrp.AddSourc e(WMENC_SOURCE_ TYPE.WMENC_VIDE O)

SrcAud.SetInput ("device://default_audio_d evice")
SrcVid.SetInput ("device://default_video_d evice")

' Retrieve the profile collection. This example uses the 3rd
profile.
ProColl = Encoder.Profile Collection
Pro = ProColl.Item(2)
SrcGrp.Profile = Pro

' Set up the push broadcast.
PushDist = Encoder.Broadca st

' Specify the push distribution variables, including the
Windows Media
' server name, publishing point, and announcement files.
' Provide real values for the following placeholders.
strServerName = "media.site.com .br"
strPubPoint = "webradio"
strPubTemplate = "tmp_online "
MyNSCFile = ""
MyNSCURL = ""
MyASXFile = ""

' Remove the publishing point when the broadcast is over.
PushDist.AutoRe movePublishingP oint = True

' Set the push distribution variables.
PushDist.Server Name = strServerName
PushDist.Publis hingPoint = strPubPoint
PushDist.Templa te = strPubTemplate
Encoder.Prepare ToEncode(True)
End Sub
End Class
'============== =============== =======

Could anybody please help me out.
Any hints/ ideas will be highly appreciated.
Thnx
Crisco