Leverage Cache Browsing 0/100?

[HipHopFeeling]

Hey,

I keep getting an F with 0/100 score for Leverage browser caching of static assets.

Bare with me, cause I don't fully understand how this all works, but from my understanding, this should be fixable by changing the htaccess file for the site. I tried adding both mod_expires and mod_header codes but whatever I try, nothing seems to change (I tried deactivating other cache programs in WP so they won't overrule it).

Anyone knows how to change this?

the site is http://www.hiphopfeeling.com btw