Well, after some to-ing and fro-ing with various files, I finally got the correct file (I think).
Strangely, the entire page is made up of Javascript rather that HTML, but as far as I can see, it should open a mailto email form as expected.
I don't know much about Webcreator, but if it creates all of its web pages as Javasript, it's not going to be particularly compatible with a wide range of browsers.
I suggested to Clive that he may want to find a better tool to work with, such as CoffeeCup or even Microsoft FrontPage