thanks Srividya, but unfortunately no, still doesn't work, the relevant part of the html now looks like this:
Have tested the change you suggested with firefox and it still works, with IE we're still getting the "Movie not Loaded" error.
Unless there are any other suggestions we might have to try another flash product, it's a shame as Fusion Charts it's a really good product and we've already spent $200 on the developer edition. But if it doesn't work with IE we'll have to move onto something else.
Regards
Alan