Getting started with C# example

Hi guys,

I'm just trying to get up and running with the C# example project. I've replaced the lines:

// I've put my actual key and secret in here

private const string DeveloperKey = "yep, my correct key is in here";
private const string DeveloperSecret = "yep, my correct secret is in here";

// and set this to true

private const bool UseCloud = true;

App builds and runs OK. MYOB Oauth2 Authentication screen launches and I put in my correct email address and password (these are certainly correct as I run the AccountRight desktop app all the time with these details). 

Next screen I see is a window showing: