Xdebug won't run on local website in NetBeans - php

Question

I've created a PHP project in NetBeans called TerraNubis. The project folder and source folder are located in C:\development\TerraNubis. In the Project Properties window, in the Run Configuration tab I've set the option to run the configuration as local website, the project url to http://localhost/TerraNubis/ and the index file to index.php.
I installed XAMPP (xampp-win32-7.1.11-0-VC14-installer.exe on Windows 10) and downloaded Xdebug (php_xdebug-2.5.5-7.1-vc14.dll, which is now located in C:\xampp\php\ext).
The files from the sources folder are being copied to C:\xampp\htdocs\TerraNubis. In the NetBeans Options window I've set the PHP 5 interpreter to C:\xampp\php\php.exe. In the Debugging tab, the debugger port is set to 9000, the session ID to netbeans-xdebug and the maximum data length to 2048. All the checkboxes in this tab are empty.
In my php.ini file I commented out
zend.enable_gc = On
and at the bottom of the file I added the following code:
[XDEBUG]
zend_extension = "C:\xampp\php\ext\php_xdebug-2.5.5-7.1-vc14.dll"
xdebug.idekey = netbeans-xdebug
xdebug.profiler_append = 0
xdebug.profiler_enable = 0
xdebug.profiler_enable_trigger = 0
xdebug.profiler_output_dir = "C:/xampp/tmp/xdebug"
xdebug.profiler_output_name = "cachegrind.out.%t-%s"
xdebug.remote_enable = 1
xdebug.remote_autostart = 0
xdebug.remote_connect_back = 0
xdebug.remote_host = "127.0.0.1"
xdebug.remote_port = 9000
xdebug.remote_handler = "dbgp"
xdebug.remote_mode = req
xdebug.remote_log = "C:/xampp/tmp/xdebug/xdebug_remot.log"
xdebug.show_local_vars = 9
xdebug.trace_output_dir = "C:/xampp/tmp"
In NetBeans, when I right click on the TerraNubis project in the Projects tree and click on Debug, I see at the bottom right the message: "Waiting For Connection (netbeans-xdebug)". Then nothing happens. It just keeps displaying the same message.
How can I run the Xdebug properly on a local website?