httpwebrequest asynchronous calls work on one server but not on another

[sindhurasingeetham]

Hi,

I'm new to coding in .NET. I am trying to do an asynchronous call in my code using httpwebrequest. This code works perfectly fine on one server, but does not work on another. The main flow works on the new server, but it somehow does not do the asynchronous calling part. I'm unable to see the async part hitting IIS (from the IIS logs) as well. I have compared the IIS settings on both the servers and they are the same. The settings on both servers are such that the ASP page being called accepts POST requests. Could someone please suggest if I'm missing something here?

Here is the relevant extract from my code:

' Removed some appln specific code
Imports System.Text
Imports System.IO
Imports System.Net
Imports System.Threading
Imports Microsoft
' Removed some appln specific code

Public Class clsAppmtCleanUp

' Removed some appln specific code

    Public Sub Schedule_PH(ByRef objSXP As Telstra.Connect.DataLayer.clsDataLayerComponent, _
                           ByVal strConnectID As String, _
                           ByRef objCodeDBCP As CodesDBCPLib.ILookup, _
                           ByRef objErr As ConnectEventDetails)

' Removed some appln specific code

    Dim request As HttpWebRequest
    Dim result As IAsyncResult

' Removed some appln specific code

    Try
            ' Set web request properties
            strURL = 'http://localhost/INT/W6PIncomingProcessor.asp'
            request = CType(WebRequest.Create(strURL), HttpWebRequest)
            request.Credentials = System.Net.CredentialCache.DefaultCredentials
            request.ContentType = "application/x-www-form-urlencoded"
            request.Method = "POST"

            result = CType(request.BeginGetRequestStream(AddressOf RequestComplete, request), IAsyncResult)
            'T0 Execute the Schedule_PH as one thread and RequestComplete as Different Thread
            objAllDone.WaitOne()

        End If

    Catch ex As Exception
    Finally

' Removed some appln specific code
	
	request = Nothing
        result = Nothing

    End Try

    End Sub

    Private Sub RequestComplete(ByVal asynchronousResult As IAsyncResult)

    Dim request As HttpWebRequest
    Dim postStream As Stream
    Dim byteArray As Byte()

    Try

        request = CType(asynchronousResult.AsyncState, HttpWebRequest)
        postStream = request.EndGetRequestStream(asynchronousResult)
        byteArray = Encoding.UTF8.GetBytes(g_strMessage)
        postStream.Write(byteArray, 0, g_strMessage.Length)
        objAllDone.Set()
    Catch ex As Exception

    Finally
        postStream.Close()

    End Try

    End Sub

' Removed some appln specific code

End Class

Any suggestions that you can give would be of great help!

Thanks,
Sindhura

[sindhurasingeetham]

Sorry, forgot to mention.

Both servers are Windows 2003 servers (SP1) and have IIS6.0 installed.