Send multiple variables to a URL with POST to SQLSRV + php

[david alfredo zuñiga soto]

Hi all, a little help please.
in my app of LiveCode use this sentence:        put "tIDUsr=" & IDUsr & "&tPWD=" & PWD & "&tCorreo"&correo into tArgList        post tArgLists to URL "http://172.16.2.130:8080/BuscarNombreUsr.php"        put it into encodeNombre
Presumably, sent the user id, password and mail my script of php.. but. This only marks | Undefined index: tIDUsr in| and this is for all data sent..

my script php does this..

<?phpinclude 'conexion.php';  # the connection works fine.      $IDUsr=$_POST["tIDUsr"];     $nIDUsr=(int)$IDUsr; #convertir la cadena a entero, para comparar con tynit en la bd     $PWD=$_POST["tPWD"];    $Correo=$_POST["tCorreo"];        $query = "SELECT Nombre FROM tblusuarios WHERE IDUsuario='$nIDUsr' and Contraseña='$PWD' and Correo='$Correo'";    $stmt4 = sqlsrv_query( $conn, $query);        if( $stmt4 === false)        {             echo "Error in query preparation/execution.\n";              die( print_r( sqlsrv_errors(), true));        }                while( $row = sqlsrv_fetch_array( $stmt4, SQLSRV_FETCH_ASSOC))        {            echo $row['Nombre']."\n";        }        $stmt4 = null;        $conn = null;?>
any suggestions ?? thanks for everything