Need to specify a sidebar for the search results page

Hi there,
just wanted to say thanks for this excellent plugin, it's exactly what I was looking for BUT I need the results to be displayed on a search page and so I've selected the 'show sidebar on search page' option.Unfortunately the search page doesn't display a sidebar. I suspect this may be something to do with the pretty radical modifications I've used in my templates, but it would be great if you could either let me know how I can specify which sidebar I'd like to appear or failing that if I could specify a full width page for my search page results instead.

Many thanks!

The URL is as follows: - its a test environment