The page stops loading while prefetching the fonts

I tried to make this module work with sIFR2, I just saved the javascript from sIFR2 in a folder inside the module like it´s said in the instructions, but I dont´know why but it doesn´t work, nothing happens.

But with sIFR3 it works, but I found a strange behaviour. For example: If I want to go the site writing the URL in the address bar, I just have a quick flash of the webpage and then a blank page. And then, if I click on View Source, this is all I get:

<script defer type="sifr/prefetch" src="/sites/default/files/render/gothamultra.swf"></script>

It´s only happening with the homepage, but if I visit a different page, and then click on the homepage on the menu it works. It´s so weird.

Does anyone know what is happening?

Thanks!