[VB.NET] Problem Posting Data

Im trying to post data from a VB.NET application to a web form, but its not passing the fields (it is doing a posting request)

Not all the code, just the code applicable to the problem.

    Public Client As New System.Net.WebClient
    Public Function HTTPRequest(ByVal URL As String, ByVal postString As String, Optional ByVal Method As String = "POST") As String
        Dim serverResponse() As Byte
        Dim postBytes As Byte() = System.Text.Encoding.ASCII.GetBytes(postString)
        Try
            serverResponse = Me.Client.UploadData(URL, Method, postBytes)
            ' Gets data from server!
        Catch ex As Exception

            MsgBox(ex.Message, MsgBoxStyle.Critical, ex.Source & " Error")
            Exit Function
        End Try
        Dim responseHTML As String = (System.Text.Encoding.ASCII.GetString(serverResponse))
        ' Turns server response(in bytes) into a string(HTML)
        Return responseHTML
    End Function



'Execute function code

Dim postStr As String = "type=100"
Dim submiturl As String = "http://127.0.0.1/posting.php"
        response = HTTPRequest(submiturl, postStr)

Code (markup):

Any ideas?