Plugin search isn't working

search results say nothing found.

i’ve created a search page and added the shortcode:

[bookingsearch searchresults=’http://www.mydomain.com/search-results/’ noresultstitle=’Nothing Found.’ searchresultstitle=’Search results:’]

I’ve then created a search results page and added

[bookingsearchresults]

but no results are ever shown

http://wordpress.org/extend/plugins/booking/