Due to an unknown error hatası

Merhaba arkadaşlar formda gönderim yapıldığında alttaki hatayı alıyorum.


Due to an unknown error, your form was not submitted. Please resubmit it or try later.

Form submit yapmıyor. Kodları görmeden yardımcı olamayız sanırım.

<form id="reservation_form" class="reservation_form reservation_form_page" action="" method="post">
<div class="row">
<div class="six columns b0">
<div class="form-row field_text">
<label><?php _e('Your Name:','smooththemes'); ?></label><br>
<input id="reservation_name" class="input_text required" type="text" value="" name ="reservation_name">
</div>
<div class="form-row field_text">
<label><?php echo _e('Your email address:','smooththemes'); ?></label><br>
<input id="reservation_email" class="input_text required" type="text" value="" name ="reservation_email">
</div>
<div class="form-row field_select">
<label><?php _e('Choose room type:','smooththemes'); ?></label><br>
<div class="select-box">
<span><?php _e('Select a room','smooththemes'); ?></span>
<select class="" name="reservation_type" id="reservation_type">
<?php
// added in ver 1.3
$args = array();
$args['posts_per_page'] ='-1';
$args['orderby'] = 'post_title';
$args['order'] = 'ASC';
$args['post_type']='room';
if(st_is_wpml()){
$args['sippress_filters'] = true;
$args['language'] = get_bloginfo('language');
}

// echo var_dump($wp_query);
$new_query = new WP_Query($args);
$myposts = $new_query->posts;
foreach($myposts as $p){
?>
<option value="<?php echo esc_attr(apply_filters('the_title',$p->post_title)) ?>"><?php echo apply_filters('the_title',$p->post_title) ; ?></option>
<?php
}

/*
?>

<option value="Single_Room"><?php _e('Single Room','smooththemes'); ?></option>
<option value="Double_Room"><?php _e('Double Room','smooththemes'); ?></option>
<option value="Deluxe_Room"><?php _e('Deluxe Room','smooththemes'); ?></option>
<option value="Family_Suite"><?php _e('Family Suite','smooththemes'); ?></option>
<?php
*/

wp_reset_query(); ?>
</select>
</div>
</div>
<div class="form-row field_select">
<label><?php _e('No. of adults:','smooththemes'); ?></label><br>
<div class="select-box">
<span>1</span>
<select class="" name="reservation_adults" id="reservation_adults">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="3">4</option>
<option value="3">5</option>
</select>
</div>
</div>
<div class="clear"></div>
<div class="form-row">
<label><?php _e('Arrival Date:','smooththemes'); ?></label><br>
<input id="reservation_arrival" type="hidden" name="reservation_arrival" value="" placeholder="" class="input_text">
<div id="arrival_date"></div>
</div>

</div>
<div class="six columns b0">
<div class="form-row field_text">
<label><?php _e('Your Address:','smooththemes'); ?></label><br>
<input id="reservation_address" class="input_text" type="text" value="" name ="reservation_address">
</div>
<div class="form-row field_text">
<label><?php _e('Your phone number:','smooththemes'); ?></label><br>
<input id="reservation_phone" class="input_text required" type="text" value="" name ="reservation_phone">
</div>
<div class="form-row field_select">
<label><?php _e('No. of rooms:','smooththemes' ); ?></label><br>
<div class="select-box">
<span>1</span>
<select class="" name="reservation_room_number" id="reservation_room_number">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="3">4</option>
</select>
</div>
</div>
<div class="form-row field_select">
<label><?php _e('No. of children:','smooththemes'); ?></label><br>
<div class="select-box">
<span>0</span>
<select class="" name="reservation_children" id="reservation_children">
<option value="0">0</option>
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="3">4</option>
</select>
</div>
</div>
<div class="clear"></div>
<div class="form-row">
<label><?php _e('Departure Date:','smooththemes'); ?></label><br>
<input id="reservation_departure" type="hidden" name="reservation_departure" value="" placeholder="" class="input_text">
<div id="departure_date"></div>
</div>
</div>
<div class="clear"></div>
</div>
<div class="form-row field_textarea">
<label><?php _e('Special Requirements:','smooththemes'); ?> </label>
<textarea id="requirements" class="" name="reservation_requirements"></textarea>
</div>
<div class="form-row field_submit mt20">
<input type="submit" value="<?php _e('Submit Now','smooththemes'); ?>" id="reservation_submit" class="btn">
<span class="loading hide"><img src="<?php echo st_img('loader.gif'); ?>"></span>
</div>
<div class="form-row notice_bar">
<p class="notice notice_ok hide"><?php _e('Thank you for contacting us. We will get back to you as soon as possible.','smooththemes'); ?></p>
<p class="notice notice_error hide"><?php _e('Due to an unknown error, your form was not submitted. Please resubmit it or try later.','smooththemes'); ?></p>
</div>
<input type="hidden" name="to_email" value="<?php echo esc_attr($data['to_email']); ?>" />
</form> <!-- END Reservation Form -->