Собственно помогите найти и исправить ошибку.
Смысл такой: нажимаю на кнопку "<input type="submit" class="in_bag" value="в корзину" />" в ответ получаю ошибка 404
Ниже куски кодов которые так или иначе связаны с кнопкой или между собой

<ul class="product_list">
			<? foreach($price['moduls'][$group['id']] as $k => $item) { ?>
			<li itemscope itemtype="http://schema.org/Product" <?=(($k+1) % 4 == 0 ? 'class="last"' : '')?> >
				<form action="/cart/buyajax" class="cart-form">
				<input type="hidden" name="id" value="<?=$item['id'] ?>" />
				<input type="hidden" name="sid" value="<?=$item['id_seriya'] ?>" />
				<input type="hidden" name="type" value="<?=$type ?>" />
				
				<span itemprop="name" class="title">
					<?=$item['name']?>
				</span>
				<div class="img">
					<img itemprop="image" src="/images/?w=130&h=100&zc=2&src=/images/modul/<?=$item['pict']?>" />
				</div>
				<? if(is_array($item['color_base']) && sizeof($item['color_base']) > 0) { ?>
					<select name="id_color_base" class="color">
						<? foreach($item['color_base'] as $color) { ?>
							<option itemprop="color" value="<?=$color['id']?>"><?=$color['name']?></option>
						<? } ?>
					</select>
				<? } ?>
				<div class="param">Артикул: <span class="value"><?=$item['articul']?></span></div>
				<div class="param">Размер: <span class="value"><?=$item['length']?>x<?=$item['width']?>x<?=$item['height']?></span></div>
				<div class="count">Кол-во: <input name="quantity" type="text" size="2" class="count" value="1"/> шт.</div>
				<div itemprop="offers" itemscope itemtype="http://schema.org/Offer">
					<div itemprop="price" class="price"><?=getprice($item['price'], $item['nominal'], $item['value'], $item, 'deltaprice_site')?> руб.</div>
				</div>
				<!-- <a href="#" class="in_bag">в корзину</a> -->
				<input type="submit" class="in_bag" value="в корзину" />
			</li>
			</form>
			<? } ?>
		</ul>

$jq(document).ready(function($){
	var h = $(window).height();
	h = h - 40;
	$('.light_cart a').fancybox({
		'width'		: 800,
		'height'	: '95%'//,
		//'scrolling'	: 'auto',
		//'autoDimensions':false,
		//'centerOnScroll':true
	});

	$('body').on('submit','.cart-form',function(){
		var obj = $(this);
		var targ = obj.attr('action');
		var params = obj.serialize();
		$.post(targ,params,function(data){
			if (data.status == 'ok') {
				$('td.sum2').text(data.sum);
				$.fancybox.close();	
				$('body').showMessage({
					thisMessage: ['Товар добавлен в корзину!'],
					autoClose: true,
					delayTime: 3000,
					escText:'',
					closeText: '[x]'
				});
			}			
		},'json');
		return false;
	});
});

полный файл ajax_mebel_modul.php

 <div class="cart-table-container">
	<form name="form1" method="post" action="/cart/buyajax" class="cart-form">
<?
$myCI =& get_instance();
$price_up = $myCI->ip_get->get_price_up();
?>
<input type="hidden" name="b_link" value="<?= $link ?>" />
<input type="hidden" name="sid" value="<?= $item['info']['sid'] ?>" />
<input type="hidden" name="id" value="<?= $item['info']['id'] ?>" />
<input type="hidden" name="type" value="<?= $type ?>" />
<input type="hidden" id="region" value="<?= $price_up ?>" />
<input type="hidden" id="use_formula" value="<?= $item['info']['use_formula'] ?>" />
<input type="hidden" id="volume" value="<?= $item['info']['volume'] ?>" />
<input type="hidden" id="weight" value="<?= $item['info']['weight'] ?>" />
<input type="hidden" id="price" value="<?= $item['info']['price'] ?>" />
<input type="hidden" id="factory_price" value="<?= $item['info']['factory_price'] ?>" />
<input type="hidden" id="value" value="<?= $item['info']['value'] ?>" />
<input type="hidden" id="nominal" value="<?= $item['info']['nominal'] ?>" />
<input type="hidden" id="deltaprice_site" value="<?= $item['info']['deltaprice_site'] ?>" />
<input type="hidden" id="deltaprice_purchasing" value="<?= $item['info']['deltaprice_purchasing']?$item['info']['deltaprice_purchasing']:$item['info']['factory_price'] ?>" />
<input type="hidden" id="euro_value" value="<?= $item['info']['euro_value'] ?>" />

<?	$buf = array();
	if ($item['base_color'] || $item['additional_color'])
		$buf[] = 'цветовую гамму';
	if ($item['upholst'][0]['color'])
		$buf[] = 'варианты обивки';
	
	
	if ($buf)
		echo '<h4>Перед добавлением товара в корзину, выберите '.implode(' и ', $buf).'</h4>' ?>
	<table class="cart-table">
	<tr>
		<th>Наименование</th>
		<th width="100">Количество</th>
		<th width="100">Цена, руб</th>
	</tr>
	<tr>
		<td style="padding: 10px;">
			<?= img( array(
				'src' => 'templates/cart_color/img/rama_cart1.gif', 
				'alt' => $item['info']['img_alt'], 
				'title' => $item['info']['img_alt'], 
				'style' => 'background: #ffffff url(/images/modul/'.$item['info']['pict'].') no-repeat center; float:left; margin-right:10px;')) ?>
			<div>
				<?= getarticul($item['info']['articul']) ?>

				<?= getname($item['info']['name']) ?>

				<?= getsize($item['info']['length'], $item['info']['width'], $item['info']['height'], true) ?>

				<?= getdiametr($item['info']['diametr'], true) ?>

			</div>
		</td>
		<td align="center"><?= form_input(array( 'name' => 'quantity', 'maxlength' => 3, 'value' => 1, 'class' => 'quantity' ))?></td>
		<td align="center" id="s_price">
			<?= getprice($item['info']['price'], $item['info']['nominal'], $item['info']['value']) ?>
		</td>
	</tr>	
<?	if ($item['base_color']) { ?>
	<tr>
		<td colspan="3">
			<?= heading ('Основные цвета', 5); ?>
			<ul class="list color_list">
				<?	foreach ($item['base_color'] as $key => $row) : ?>				
				<li>
					<?= form_label ( 
					img ( array ( 
						'class' => 'swaper_color',
						'src' => '/images/color/'.$row['pict'], 
						'title' => $row['pict_alt'],
						'alt' => $row['pict_alt']) ), 'id_color_base_'.$row['id']
					) ?>
					<?= form_radio( array( 
						'name' => 'id_color_base',
						'checked' => ($key == 0),
						'id' => 'id_color_base_'.$row['id'],
						'class' => 'price_up_'.$row['price_up'],
						'value' => $row['id'] ) ) ?>
					<?= $row['name'] ?>
				</li>
				<?	endforeach ?>
			</ul>
		</td>
	</tr>
<? } ?>	

<?	if ($item['additional_color']) { ?>
	<tr>
		<td colspan="3">
		<?= heading ('Дополнительные цвета', 5); ?>
			<ul class="list color_list">
			<?	foreach ($item['additional_color'] as $key => $row) : ?>				
				<li>
				<?= form_label ( 
				img ( array ( 
					'class' => 'swaper_color',
					'src' => '/images/color/'.$row['pict'], 
					'title' => $row['pict_alt'],
					'alt' => $row['pict_alt']) ), 'id_color_additional_'.$row['id']
				) ?>

				<?= 
				form_radio( array(
					'name' => 'id_color_additional',
					'checked' => ($key == 0),
					'id' => 'id_color_additional_'.$row['id'],
					'class' => 'price_up_'.$row['price_up'],
					'value' => $row['id'] ) ) ?>

				<?= $row['name'] ?>
				</li>
			<?	endforeach ?>
			</ul>
		</td>
	</tr>
<? } ?>		

<?	if (sizeof($item['upholst'][0]['color']) > 0 ) { ?>
	<tr>
		<td colspan="3">
		<h4>Варианты обивки</h4>
		<?	foreach ($item['upholst'] as $ky => $itm) : ?>		
		<? if ($itm['color']) { ?>
			<?= heading ($itm['name'], 5); ?>
				
			<ul class="list color_list">
			<?	foreach ($itm['color'] as $key => $row) : ?>				
				<li>
					<?= form_label ( 
					img ( array ( 
						'class' => 'swaper_color',
						'src' => '/images/upholst/'.$row['pict'], 
						'title' => $row['pict_alt'],
						'alt' => $row['pict_alt']) ), 'id_color_up_'.$row['id']
					) ?>

					<?= 
					form_radio( array(
						'name' => 'id_color_up',
						'checked' => ($ky == 0 && $key == 0),
						'id' => 'id_color_up_'.$row['id'],
						'class' => 'price_up_'.$row['price_up'],
						'value' => $row['id'] ) ) ?>

					<?= $row['name'] ?>				
				</li>
			<?	endforeach ?>
			</ul>
		<? } ?>	
		<?	endforeach ?>	
		</td>
	</tr>
<? } ?>	
	<tr>
		<td colspan="3" align="center">
			<?= form_submit(array( 
			'type' => 'image', 
			'src' => '/templates/cart_color/img/basket.gif', 
			'alt' => 'Добавить в корзину', 
			'title' => 'Добавить в корзину',
			'id' => 'b_buy', 
			'onMouseOver' => "src='/templates/cart_color/img/basket_on.gif';",
			'onMouseOut' => "src='/templates/cart_color/img/basket.gif';"  ))?>
		</td>
	</tr>
</table>
<?= form_close()?>
</div>

p/s/ css думаю не нужны =)