WP-Property – All properties admin (wp-admin) problem sorting by attribute

Hello wordpress friends,

I’m in a big trouble. I’m trying to sort properties by attributes in “All Properties” page (in wp-admin, backend).

I know tha it’s easy to order properties by attributes in the frontend, but I can’t find the piece of code into the plugin which determines the order which the properties are shown.

A screenshot of what want:
http://postimg.org/image/fgk355cj1/

http://ww.wp.xz.cn/extend/plugins/wp-property/