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