Trying to Paypal balance show up in textbox VB.NET - Programmers Heaven

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Trying to Paypal balance show up in textbox VB.NET

To be clear, what I am trying to acheive is:
Have my Paypal current balance show up in a textbox on VB.NET using the PayPal API
Not a VB.Net Webbrowser

I have followed the guide on this page
http://www.blog-dotn....tarted).aspx

But I keep getting the error
Object reference not set to an instance of an object.

when I execute this code in VB.NET:
Imports PayPalAPITest.com.paypal.www

Public Class Form1

Private Sub btnGetBalance_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnGetBalance.Click
Dim credentials As New UserIdPasswordType
credentials.Username = "*********_api1.live.co.uk"
credentials.Password = "****************"
credentials.Signature = "****************.****************-****************"
credentials.Subject = "****************@********.co.uk"

Dim customSecurityHeader As New CustomSecurityHeaderType
customSecurityHeader.Credentials = credentials

Dim ServiceInterface As New PayPalAPISoapBinding
ServiceInterface.Url = "https://api-3t.paypal.com/2.0/"
ServiceInterface.RequesterCredentials = customSecurityHeader

Dim request As New GetBalanceRequestType
request.Version = "59.0"

Dim req As New GetBalanceReq
req.GetBalanceRequest = request

Dim response As GetBalanceResponseType
response = ServiceInterface.GetBalance(req)

Me.txtBalance.Text = response.Balance.Value
End Sub
End Class



Has anyone managed to get this to work??
If so, please lend a hand
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