Hi Chrispazz,
You haven't given us much to go on, so I'm just guessing here, you may have already tried this.
Have you checked that the 'newdeveloper' user has been correctly registered in the Hue Bridge? you can do this as follows:
Go to http://<bridge ip address>/debug/clip.html
Enter /api/newdeveloper in the URL field and click on GET
If the Response has the string 'Unauthorised user' in it then the user was not registered correctly in the system. You'll need to try creating the user again.
If the response lists 'Lights' then the username has been correctly registered in the Hue Bridge, make sure it matches that in Home Genie:
Configure -> Automation -> Devices and Things -> Philips Hue Bridge
Important: the user name is case sensitive, make sure that it exactly matches the name in HomeGenie.
If all this doesn't help, you'll need to try creating the user again, hope this helps.