Downloads tracking problem (no replies)

Hi,

I've downloaded a pdf files but it isn't in the dowloads report page. I've tried to add a class "piwik_download", but it's the same.

My test page, it WordPress 4.2.2 : https://www.mines-telecom.fr/le-nouveau-blog-recherche-innovation-est-en-ligne/

Does anyone have a solution ?

Thanks.
Oli