Adsense Ad Won't show with Widget! help!

Hi everyone, I have numerous adsense ads set up around my website and after adding one above the “EPL TABLE” towards the center of the page It wont appear. I’m 100% sure I inserted the code right into the widget however all it shows is a blank square spot. I have a feeling I messed something up when I was editing stuff in my css but I have no idea what It could be since the ad was working yesterday.

the theme im using is Mediapress.

someone please help!

ps: if you have an answer please keep in mind I’m a total noob with css.

Thank you!!!!