Login to a SSO site and extract data from a web page using VB.Net

Question

I'm trying to connect to an intranet web site (SSO) and read information from a specific web page. I attempted to achieve this using the following approaches:

1

Dim request As HttpWebRequest = CType(HttpWebRequest.Create("https://internal.JMedia-ts/8978497.com"), HttpWebRequest)
'set the cookie container object
request.CookieContainer = New CookieContainer()
request.Method = "POST"
request.ContentType = "application/x-www-form-urlencoded"
Dim data As String = String.Format("username={0}&password={1}", "USER10001", "******")
Dim bytes() As Byte = System.Text.Encoding.UTF8.GetBytes(data)
request.ContentLength = bytes.Length
Dim response As HttpWebResponse = request.GetResponse

Dim reader as StreamReader = New StreamReader(response.GetResponseStream())
Dim rawData As String
rawData = reader.ReadToEnd()

2 Used "Negociate", "Basic", "NTLM" as methods

Dim myRequest As WebRequest = WebRequest.Create("https://internal.JMedia-ts/8978497.com")
myRequest .Timeout = 90000 
Dim myCache As New CredentialCache()
myCache .Add(New Uri("https://internal.JMedia-ts/8978497.com"), "Negotiate", New NetworkCredential("USER10001", "*******"))
myRequest.Credentials = mycache
Dim response As HttpWebResponse = DirectCast(myRequest.GetResponse(), HttpWebResponse)

Dim reader as StreamReader = New StreamReader(response.GetResponseStream())
Dim rawData As String
rawData= reader.ReadToEnd()

I don't get any errors but login fails in both cases. rawData variable shows I am redirected to generic web page saying... "If you're a first time user click this link to acquire your password... etc...etc..." Any suggestions?

Thank you