I can't see web, dataviz and themebuilder demos

[José]

when i wan't to see these demos:
http://demos.kendoui.com/web/overview/index.html
http://demos.kendoui.com/dataviz/overview/index.html
http://demos.kendoui.com/themebuilder/index.html

demos doesn't work.
 I'm using firefox 9.
I tried with Chrome 16.0.912.63 too but
i'm attaching images.
do i have to configure something on the explorer?.

Thank you.