error tour not found using google earth tour example

[Iuliana Cornelia Niculita]

Hi,

I have implemented the example from here: https://google-developers.appspot.com/earth/documentation/samples/tour_example

in the page http://geographgis.com/gearth/tour.html

The example works, but the problem is that when I edit the kml file (I modify the ballon <gx:balloonVisibility>0</gx:balloonVisibility> to 1), the code does not find the tour anymore.
I have validated the modified kml file here: feedvalidator.org.

Any clue? Thanks!