No effect widget rollover images

I’d love some help with this. I installed this plugin to eliminate flashing on the navigation buttons on my sidebar. It seems to have had no affect. The still flash when rolled over the first time. Any advice would be gratefully received.

http://www.capitalcitysocials.com