Pagination error, wp-pagenavi plugin

Hello,

I have created a website using wp-custom-fields-search in one domain and it worked fine. When i tried to move the same website to another domain, the pagination of the results page is broken.

If i add ../page/2/.. to the url the results page displays fine. This means that the plugin finds the right results, but the pagination is broken.

Does anyone have an idea?

here it works fine: http://www.westcom.gr/karadimas/?search-class=DB_CustomSearch_Widget-db_customsearch_widget&widget_number=2&all-3=%CE%95%CE%BB%CE%B1%CF%83%CF%84%CE%B9%CE%BA%CE%AC&cs-all-0=175&cs-all-1=&cs-all-2=&search=Search

and here not: http://www.karadimas-tires.gr/category/products/?search-class=DB_CustomSearch_Widget-db_customsearch_widget&widget_number=2&all-3=%CE%95%CE%BB%CE%B1%CF%83%CF%84%CE%B9%CE%BA%CE%AC&cs-all-0=175&cs-all-1=&cs-all-2=&search=Search

Thanks!

https://wordpress.org/plugins/wp-custom-fields-search/