OK, after much research and hair pulling I've found why I can't get Flash Player to work. I'm running an old AMD Athlone 2800xp machine and apparently Flash does not get on with the cpu.
I've downloaded Flash Player 9 from the Adobe archive but I really need someone to work me through how to uninstall the current Flash Player and then get this one installed.
Sorry if I seem a bit thick but I'm very new to this (but really enjoying learning!).