Necesito saber si tengo algun fallo en el codigo fuente tras insertar un registro me sale este 
 
error :
 
Warning: Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\webdefinitiva\includes\slider.php:  55) in C:\xampp\htdocs\webdefinitiva\includes\registro.ph  p on line 54 
 
 
os pongo el codigo fuente :
 
<?php require_once('Connections/registrodb.php'); ?>
<?php
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "", $theNotDefinedValue = "") 
{
  if (PHP_VERSION < 6) {
    $theValue = get_magic_quotes_gpc() ? stripslashes($theValue) : $theValue;
  }
 
  $theValue = function_exists("mysql_real_escape_string") ? mysql_real_escape_string($theValue) : mysql_escape_string($theValue);
 
  switch ($theType) {
    case "text":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;    
    case "long":
    case "int":
      $theValue = ($theValue != "") ? intval($theValue) : "NULL";
      break;
    case "double":
      $theValue = ($theValue != "") ? doubleval($theValue) : "NULL";
      break;
    case "date":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;
    case "defined":
      $theValue = ($theValue != "") ? $theDefinedValue : $theNotDefinedValue;
      break;
  }
  return $theValue;
}
}
 
$editFormAction = $_SERVER['PHP_SELF'];
if (isset($_SERVER['QUERY_STRING'])) {
  $editFormAction .= "?" . htmlentities($_SERVER['QUERY_STRING']);
}
 
if ((isset($_POST["MM_insert"])) && ($_POST["MM_insert"] == "form1")) {
  $insertSQL = sprintf("INSERT INTO registrodb (Nombre, Email, Usuario, Password) VALUES (%s, %s, %s, %s)",
                       GetSQLValueString($_POST['Nombre'], "text"),
                       GetSQLValueString($_POST['Email'], "text"),
                       GetSQLValueString($_POST['Usuario'], "text"),
                       GetSQLValueString($_POST['Password'], "text"));
 
  mysql_select_db($database_registrodb, $registrodb);
  $Result1 = mysql_query($insertSQL, $registrodb) or die(mysql_error());
 
  $insertGoTo = "index.php";
  if (isset($_SERVER['QUERY_STRING'])) {
    $insertGoTo .= (strpos($insertGoTo, '?')) ? "&" : "?";
    $insertGoTo .= $_SERVER['QUERY_STRING'];
  }
  header(sprintf("Location: %s", $insertGoTo)); Aquí En esta linea da el error
}
?>
 
<form action="<?php echo $editFormAction; ?>" method="post" name="form1" id="form1">
  <table align="center">
    <tr valign="baseline">
      <td nowrap="nowrap" align="right">Nombre:</td>
      <td><input type="text" name="Nombre" value="" size="32" /></td>
    </tr>
    <tr valign="baseline">
      <td nowrap="nowrap" align="right">Email:</td>
      <td><input type="text" name="Email" value="" size="32" /></td>
    </tr>
    <tr valign="baseline">
      <td nowrap="nowrap" align="right">Usuario:</td>
      <td><input type="text" name="Usuario" value="" size="32" /></td>
    </tr>
    <tr valign="baseline">
      <td nowrap="nowrap" align="right">Password:</td>
      <td><input type="password" name="Password" value="" size="32" /></td>
    </tr>
    <tr valign="baseline">
      <td nowrap="nowrap" align="right"> </td>
      <td><a class="button" href="javascript:document.form1.submit();"><span>I  nsertar Slider</span></a></td>
    </tr>
  </table>
  <input type="hidden" name="MM_insert" value="form1" />
</form>
<p> </p>
 
Me gustaria saber si debo cambiar algo o si necesitais algo mas.
 
Muchas gracias El saber es poder 
   
 




