Finally got my Vivid Blue EX yesterday - first I've seen in that colour, but I like it. Drove down to Leicester today (hi, Pottsy!) and loved it. However, although the Satnav shows me which way to go, it won't speak to me, even set to full volume. The Talk button doesn't produce a bleep either. Am I doing something stupid? Unfortunately the dealer gave me the demo in a different car, because mine wasn't quite ready. Any ideas, please?