Comment form() is not working

I made a custom comment template and calling it in a page. the function comment_form($arg,$id) is not working. it this function by $id i am passing post id on which i want to comment but when i click on submit button the comment was not done on that post. it save comment on the other post. the function getting the id of page from url. please help me.

<?php

	if (!empty($_SERVER['SCRIPT_FILENAME']) && 'month_comment3.php' == basename($_SERVER['SCRIPT_FILENAME']))
		die ('Please do not load this page directly. Thanks!');

	if ( post_password_required() ) { ?>
		This post is password protected. Enter the password to view comments.
	<?php
		return;
	}
?>

<?php // Posts per page setting
$ppp = get_option('posts_per_page'); // either use the WordPress global Posts per page setting or set a custom one like $ppp = 10;
$custom_offset = 5; // If you are dealing with your custom pagination, then you can calculate the value of this offset using a formula
$arg = array(
  'orderby' => 'name',
  'parent' => 0,
  'order' => 'DESC',
  'number' => '3',
  );
$taxonomies=get_terms('monthly_statement_category', $arg);$i=1;

foreach ( $taxonomies as $taxonomy ) {
 $val1=$taxonomies[0]->name;
 $val2=$taxonomies[1]->name;
 $val3=$taxonomies[2]->name;

 }

$args3=array(
  'monthly_statement_category'=>$val3,
  'post_type' => 'monthly_statement',
  'post_status' => 'publish',
  'order' => 'DESC',

);
$my_query = null;
$my_query = new WP_Query($args3);
$p=1;
if( $my_query->have_posts() ) { $my_query->the_post();
$id =get_the_ID(); $p++; wp_reset_query(); } else "no";
echo $id;

$sql = "SELECT comment_ID, comment_author, comment_date, comment_content, comment_post_ID
 FROM {$wpdb->comments} WHERE
 comment_post_ID ='".$id."' AND comment_approved = 1
 ORDER by comment_ID DESC LIMIT 0 , 10 ";

$comments_list = $wpdb->get_results( $sql );

if ( count( $comments_list ) > 0 ) {
 $date_format = get_option( 'date_format' );

 foreach ( $comments_list as $comment ) { ?>
 <div class="media">
 <a class="pull-left" href="#"><img class="media-object" src="<?php bloginfo('stylesheet_directory'); ?>/bootstrap/img/6464.png"> </a>
 <div class="media-body">
                        <h4 class="media-heading"><?php echo $comment->comment_author; ?></h4><p><?php echo substr( $comment->comment_content, 0, 50 );?></p></div>
                    </div>
 <?php } ?>
 <hr>
                    <div class="pagination">

   <?php echo paginate(); ?>

    </div>
    <hr> <?php

} else {
 echo '<p>No comments</p>';
}
?>

<div class="row-fluid">
<?php
$args = array(
  'fields'               => apply_filters( 'comment_form_default_fields', $fields ),
		'comment_field'        => '<div class="span8"><label for="comment">' . _x( 'Comment', 'noun' ) . '</label><textarea id="comment" class="span12" name="comment" cols="58" rows="5" aria-required="true"></textarea>',
		'must_log_in'          =>  sprintf( __( 'You must be <a href="%s">logged in</a> to post a comment.' ), wp_login_url( apply_filters( 'the_permalink', get_permalink( $post_id ) ) ) ) . '</p>',
		'logged_in_as'         =>  sprintf( __( 'Logged in as <a href="%1$s">%2$s</a>. <a href="%3$s" title="Log out of this account">Log out?</a>' ), admin_url( 'profile.php' ), $user_identity, wp_logout_url( apply_filters( 'the_permalink', get_permalink( $post_id ) ) ) ) . '</div>',

		'id_form'              => 'commentform',
		'id_submit'            => 'submit',
		'title_reply'          => __( 'Leave a Reply' ),
		'title_reply_to'       => __( 'Leave a Reply to %s' ),
		'cancel_reply_link'    => __( 'Cancel reply' ),
		'label_submit'         => __( 'Send Message' ),

  'fields' => apply_filters( 'comment_form_default_fields', array(

 'author' => '<div class="span4"><label for="author">Name</label>
		            <input id="author" class="span12" name="author" type="text" value="" />',
		'email'  => '<label for="email">Email</label>
		            <input id="email" class="span12" name="email" type="text" size="5" value="" /></div>',

    )
  ),
);
echo $id;
comment_form($args,$id);
?>
</div></div>