Download error

Hi,

I insert one download and I check all was fine. But today, Don’t work. In the index if you go to the widget and click you just see code. If yo go to downloads page you see code. If you go to the download page single works in several pcs, but fail on others. And from the download page single the widget work in several pcs too but fail on others. I use Google Chrome. These are the urls for reference:

Downloads page: http://www.summarios.com/zona-de-descarga/
Download page single: http://www.summarios.com/download/lista-comprobacion-cambio-uvi-ume-movil-summa-112/ (is the same in page and widget)

The url showed in Downloads page is: http://www.summarios.com/zona-de-descarga/# (is the same in page and widget)

The file is a pdf.

What should i do?

Best Regards