Skin color doesn't match (Using Mingle forums)

I am using mingle forum skins and I tried adding TWO, they both have this white every 2nd box in each forum category:

This is what I wanted: http://ddart-bg.com/wp-content/uploads/2012/05/ddart_universal_style_dark_Snap1.jpg

And this is what I get: http://i.imgur.com/CT82t.png

I added all files from the zip (unzipped it) to the FTP File Manager and activated the skin. Need help asap please.