widget scrolling under fixed header – css recommendations?

Greetings,

Your plugin is perfect for my needs- thank you…

Hoping you can give me a tip – I’m using a fixed header/nav, and the widget is floating under it – any easy fixes for this – or would you recommend altering my theme css to accomomdate a fixed sidebar?

http://sumchoices.com/

Thanks again!

Best

http://ww.wp.xz.cn/plugins/q2w3-fixed-widget/