WCF service in IIS hosted on Amazon EC2 OAuth2 not working - wcf

Question

This is my last stop in trying to get this thing to work.
I have created a WCF service in .net/C# and it is hosted in IIS (port 80) on an amazon EC2 instance. The service uses OAuth2 (GoogleWebAuthorizationBroker.AuthorizeAsync) to authorize the service to read/write files to google drive. The client app uses POST messages to call the services add method that triggers the auth and then adds a file to google drive.
My problem, and I've left no stone unturned, is that when I run the service on my dev machine, (visual studios created IIS express instance), the client has no problem when the POST is sent getting a proper successful response and adding the file to Google Drive (the file does transfer to google drive). However, when I upload the service to IIS on my Amazon EC2 instance and change the connection strings on the client to point to ec2 instance, the service returns a (400) Bad Request from the service.
I know the service works with everything except the google authorization and google drive file upload, because i removed this and the POST works, but when the google auth and google drive file upload are retained, I get a 400 bad request...
In the google dev console I have the redirect uri's setup to:
http://localhost:3537
http://localhost/authorize/
http://localhost:80/authorize/
http://localhost:80/TimesheetService.svc/authorize/
http://localhost/TimesheetService.svc/authorize/
http://localhost/authorize/
C# Using Namespaces:
using Google.Apis.Auth.OAuth2;
using Google.Apis.Drive.v2;
using Google.Apis.Drive.v2.Data;
using Google.Apis.Services;
using Google.Apis.Util.Store;
EC2 IIS setup:
The WCF service is hosted in IIS as a new site and points to localhost port 80
Here is the OAuth code that is failing on EC2 but not dev:
private static String ACTIVITY_ID = "REMOVED";
static String CLIENT_ID = "REMOVED";
static String CLIENT_SECRET = "REMOVED";
static String APP_USER_AGENT = "ApplicationB";
static String[] SCOPES = new [] { DriveService.Scope.Drive };
/// <summary> Returns the request initializer required for authorized requests. </summary>
private static async Task<DriveService> GetCredentials()
{
ClientSecrets secrets = new ClientSecrets
{
ClientId = CLIENT_ID,
ClientSecret = CLIENT_SECRET
};
IDataStore credentialPersistanceStore = getPersistentCredentialStore();
UserCredential credential = await GoogleWebAuthorizationBroker.AuthorizeAsync(secrets,
SCOPES, getUserId(), CancellationToken.None, credentialPersistanceStore);
var service = new DriveService(new BaseClientService.Initializer()
{
HttpClientInitializer = credential,
ApplicationName = APP_USER_AGENT
});
return service;
}
/// <summary>
/// Returns an ID string for the current user. IDs are unique within this application.
/// </summary>
private static String getUserId()
{
// TODO: Generate a unique user ID within your system for this user. The credential
// data store will use this as a key to look up saved credentials.
return "MyGoogleEmail#Gmail.com";
}
/// <summary> Returns a persistent data store for user's credentials. </summary>
private static IDataStore getPersistentCredentialStore()
{
// TODO: This uses a local file store to cache credentials. You should replace this with
// the appropriate IDataStore for your application.
return new FileDataStore("Drive.Sample.Credentals");
}
Can somebody please shine some light on the issues I'm facing revolving WCF on IIS in EC2 using google OAuth. I Cannot seem to get this working.