Hello Neil,
A couple of months ago I was configuring one SPA9000. It was very stressful to work with that wizard. I was running the latest version of the wizard in Win XP Service Pack 2. Then a coworker discovered that the wizard started working relatively well in Win XP Service Pack 3. Just an idea, I thought that could be helpful to you.
Hope it helps, please rate if it does.
Kind regards,
- Adrian.