I just installed Image feed widget plug-in and I figured out that the plug-in Featured Posts Scroll (http://wordpress.org/extend/plugins/featured-posts-scroll/) doesn't work! It doesn't scroll automatically or when I click on arrows. When I disable the Image feed widget, the Featured Post Scroll works again! Notice that the Image feed widget works at any time. I don't know if this a bug from Image feed widget or Featured Posts Scroll but I suppose it's the Image feed Widget as it is a beta version.
Thank you for any help