Subcategory value not come

Hi Sir,

I need your help on my website I using your plugin where I have to display location and Speciality of doctor filter. The location was posted category and Speciality were subcategories. The issue is that when I select a location to drop down then select Speciality drop-down search not come and value not come.

Here your code on plugin where you mention this

	$text .= "<input type=\"hidden\" name=\"cat\" id=\"category-{$this->id}\" value=\"0\" />";
			$text .= "<input type=\"hidden\" name=\"search_into_subcategories\" value=\"1\" />";

Can you please help me on this. I waiting for your quick response