No activation on Windows – Solved

Your plugin works great, but it doesn’t activate correctly in Windows. The problem is in this line:

$activatestr = str_replace(WP_PLUGIN_DIR . “/”, “activate_”, __FILE__);

The str_replace doesn’t work because __FILE__ contains backlashes.
You should replace this line with:

$activatestr = “activate_” . plugin_basename(__FILE__);