ERROR Register Server

[StreetNet]

Why Print Row without send entered the link and automatically sends

 <form action="" method="post"> <table width="400" border="0" align="center" cellpadding="0" cellspacing="5">
    <tr>
      <td width="200" align="left" valign="middle">Server Name</td>
      <td width="200" align="right" valign="middle"><input type="text" name="Server_Name" maxlength="25"></td>
    </tr>
    <tr>
      <td align="left" valign="middle">Server IP</td>
      <td align="right" valign="middle"><input type="text" name="Server_IP"></td>
    </tr>
    <tr>
      <td align="left" valign="middle">Server Port</td>
      <td align="right" valign="middle"><input type="text" name="Server_Port"></td>
    </tr>

    <tr>
      <td align="right" valign="middle"><input type="submit"></td>
      <td align="left" valign="middle"><input type="reset"></td>
    </tr>
  </table>
  <label for="textarea"></label>
  
</form>
   <?php
//3. Tomar los campos provenientes del Formulario
$_ServerName = $_POST['Server_Name'];
$_Server_IP = $_POST['Server_IP'];
$_Server_Port = $_POST['Server_Port'];




//4. Insertar campos en la Base de Datos (No inserto el id_empleado ya que se genera automaticamente)
$insertar = mysql_query("INSERT INTO _server (ServerName, Server_IP, Server_Port)VALUES ('{$_ServerName}','{$_Server_IP}','{$_Server_Port}')", $conexion);
if (!$insertar) {
die("Failed: " . mysql_error());
}
?>

[MentaL]