[WebODF] getting started help

hello guys, I'm a new webodf user and I'm trying to starting from the getting started example on webodf home page but I have some problems... I have downloaded the webodf.js file at http://webodf. org/demo/demobrowser/webodf.js and I have done a html page how listed in the getting started example and I have done a very simple odt page. The problem is that when I load the page in my firefox 25.0 on fedora 19 I get a page that say: "loading myfile.odt" after that nothing heppen, no odt pages are loaded... any suggestions !? g.