Warning: mysql_fetch_row() expects parameter 1 to be resource, boolean given in

$r=mysql_query("select module,unit,code,val from tpl where perm='1' or skin='$SKIN[id]' or (skin=0 and ((module='$MODULE' and unit='*') or (module='$MODULE' and unit='$UNIT')))");
while (list($m,$u,$c,$v)=mysql_fetch_row($r)) {
  if (!isset($TEMPLATE[$m])) $TEMPLATE[$m]=array();
  $TEMPLATE[$m]["$u.$c"]=$v;
  }

$SKIN['id']=mysql_real_escape_string($SKIN['id']);
$MODULE=mysql_real_escape_string($MODULE);
$UNIT = mysql_real_escape_string($UNIT);
$r=mysql_query("SELECT `module`, `unit`, `code`, `val` FROM `tpl` WHERE `perm`='1' OR `skin`='$SKIN[id]' OR `skin`=0 AND `module`='$MODULE' AND `unit`='*' OR `module`='$MODULE' AND `unit`='$UNIT' ") or die (mysql_error());
while (list($m,$u,$c,$v)=mysql_fetch_row($r)) {
  if (!isset($TEMPLATE[$m])) $TEMPLATE[$m]=array();
  $TEMPLATE[$m]["$u.$c"]=$v;
  }

function form_start($action,$id='form',$method='post',$enctype='multipart/form-data') {
  return <<<CODE
<form action="$action" method="$method" enctype="$enctype" id="$id">
CODE;
  }

function form_end() {
  return <<<CODE
</form>
CODE;
  }

<form action="$action" method="$method" enctype="$enctype" id="$id">