Can't remove slider click button, first header and second header

I'm using the woodpecker pro theme. My website is www.globalchristianlearningcenter.com

I want to remove, in slider, the click button, first header and second header. I've the following codes in CSS to remove the click button (It didn't work):

.nivo-caption a.slide-button {
display: none !important;
}

I also need the codes to remove the slider's first header and second header. I have five slider images for which I need these three things removed.

Thanks
Leslie E. Bartley

 

Thank You, so very much!!!