Text caption not wrapped in responsive

Hi,
your plugin is one not conflicting with woocommerce but I’ve a problem with Cation text. It doesn’t wrap correctly the text, I mean it is to wide respect the picture. Can you give me a correct css parameter to override it?
I’m using the responsive selection. You can see it at
http://www.expo2015-italy.com/appshop/
I’d like to show it correctly to my client before consider to upgrade to pro.
Thanks.
Angelo

http://ww.wp.xz.cn/plugins/ml-slider/