Problem with deactivate plugin

Hello, I was doing test with the plugin and I tried to deactivate it. But my problem is that the Index.php doesn´t load the page -exactly where the plugin declared-. I choose load the plugin with code (<?php wdpv_vote(); ?>:wink:, but from this line the page doesn´t load.

But it´s very curious because I have this line commented, but still the page doesn´t load.

Do you know if the plugin have changed other code´s parts? Or how can I deactivate it without problems?