query all post types for category

I have several custom post types and am having trouble getting the query to work the way I want. I can query a single post type and category just fine. When I try to query just the category of all post types I can not get any results.

My Query-
$query = new WP_Query(‘category_name’=>’available-models’)

I have also tried
$query = new WP_Query(‘cat’=>’43’)
What could I be doing wrong?