It has always been an issue trying to have it start automatically. If it's a CD you burned with the tour, the auto run file must be modified to the html file that has the tour.
On a website, I have not been able to do it either. I had to create a "CLICK HERE" image in order for the tour to start in a new window.
------------- Nikon D80
Sigma 8mm EX DG Fisheye lens
www.360PanoVista.com