Subquery returns more than 1 row

All

I have two table

1st table is : wp_frm_item_metas 2nd table is : wp_frm_items

Now i want to meta_value based on wp_frm_items table fields value.

I fired this sql. it returns me Subquery returns more than 1 row

SELECT meta_value 

FROM wp_frm_item_metas 

WHERE (item_id=(

  SELECT id 

  FROM wp_frm_items 

  WHERE form_id ='9' && user_id='1') 

&& field_id=128)

I tried this solution

SELECT meta_value 

FROM wp_frm_item_metas 

WHERE (item_id=(

  SELECT count(*) as c,id 

  FROM wp_frm_items 

  WHERE form_id ='9' && user_id='1') 

&& field_id=128 && c > 1) 

ORDER BY c DESC

It returns this error Operand should contain 1 column(s)

My code is

foreach($fp_id_c as $kid=>$id)

         {

                    if (!$id or ($logged_in && !$user_ID)) return;

                    $id = (int)$id;



                    //echo $logged_in.'-'.(int)$user_ID;

                    if ($logged_in){



                        echo $ff_id_c[$kid];

                        global $wpdb;

                        echo "SELECT meta_value FROM wp_frm_item_metas WHERE (item_id=(SELECT count(*) as c,id FROM wp_frm_items WHERE form_id ='$kid' && user_id='". (int)$user_ID ."') && ORDER BY c DESC && field_id=$ff_id_c[$kid])";

                        $result_c= $wpdb->get_var("SELECT meta_value FROM wp_frm_item_metas WHERE (item_id IN (SELECT count(*) as c,id FROM wp_frm_items WHERE form_id ='$kid' && user_id='". (int)$user_ID ."') && field_id=$ff_id_c[$kid]) ORDER BY c DESC");

                        echo $result_c; 

                    }

}