I try to built with Directory plugin a store locator

Hello!

I try to built with Directory plugin a store locator site... I set up custom tax for Dir-location, and need special advanced search to handle these data.
I use plugin WP Advanced Search, simply, well configurable.
My question:
after the search submit create a string in URL: http://mysite.com/?search_query=&, and no results...
when i edit in the URL and replace the string /?search_query=& with Wordpress standard /?s= then works wery well.
Where can i fix this? In plugin? Or in a theme search-page template?
Thank you