Default Style CSS overides Custom CSS

I was working on some CSS modification on my website and for some reason one of my custom CSS line did not take effect! Hmm… strange. As seen below I want to change the div class “.sysads-scroller” padding from ‘0 0 28px’ to ‘0px’. HTML: div class=”sysads-scroller flexy-container” Default CSS: .sysads-scroller { font-size: 12px; <div role="option"> <span style="color: #0000ff;"> padding: 0 0 28px;</span> </div> <div role="option"> <span style="color: #0000ff;"> position: relative;</span> </div> </div>