Debug wordpress application in IDEA 15

I have setup the wordpress development environment by wnmp in windows 10, and the site have started. Then I import the wordpress folder as  a project to IDEA, so far so good.

While when I want to add some breakpoints in the project, I can not make idea work with xdebug. Even I have followed the instructions.

BTW, wnmp use nginx to proxy the php request:

nginx.conf:

php_processes.conf

php.ini:

zend_extension=php_xdebug.dll

[xdebug]
xdebug.default_enable=1
xdebug.remote_enable=1
xdebug.remote_handler=dbgp
xdebug.remote_host=localhost
xdebug.remote_port=9000
xdebug.extended_info=1
xdebug.remote_autostart=1

I have installed the php plugin for IDEA, and setup the php interceptor .

What's the next?