Multiple select stored procedures from mysql

I don't understand why the code below doesn't work. I can't seem to
do multiple select stored procedures from mysql. If I close the
connection and reconnect then it works. Funny thing is that I can do
one select and one update stored procedure without closing and
reconnecting, but I can't do 2 selects. I'm using the mysqli
extention with PHP 5.2 and MySQL 5.0. Any ideas? Is this how it's
supposed to work? I'm a newbie so trash my codes as you please.
TIA...

<?php
session_start();
require('DBconn.inc');
$login = "'".$_GET['login']."'";
$role = "'".$_GET['role']."'";
$parm = "";
$parm = $parm."'".$_GET['login']."',";
$parm = $parm."'".substr(sha1($_GET['password']), 0, 10)."',";
$parm = $parm."'".$_GET['first_name']."',";
$parm = $parm."'".$_GET['last_name']."',";
$parm = $parm.$_GET['expire'].",";
$parm = $parm."'".$_GET['role']."',";
$parm = $parm."'".$_GET['dept']."',";
$parm = $parm."'".$_GET['title']."',";
$parm = $parm."'".$_GET['email']."',";
$parm = $parm."'".$_GET['phone']."',";
$parm = $parm."'".$_SESSION['phpAcctSoft-login']."',";
$parm = $parm."'".$_SESSION['phpAcctSoft-login']."'";
$sql = "CALL sy3022a($login)";
$result = $cnn->query($sql);
if ($result->num_rows)
{
$msg = "Login already exist!";
}
else
{
$result->close();
//$cnn->close();
//$cnn = new mysqli('localhost','user','password','db');
$sql = "CALL sy3022b($role)";
$result = $cnn->query($sql);
if (!$result->num_rows)
{
$msg = "Role does not exist!";
}
else
{
$result->close();
$sql = "CALL sy3022($parm)";
$cnn->query($sql);
$msg = "User created.";
}
}
$result->close();
$cnn->close();
echo($msg);
?>

Code was quite long to start debug, but often with

error_reporting(E_ALL);
in the beginning and

echo $somesuspectiblevariable;
here and there and

echo mysql_error();
after every query

you can find out a bunch of things..:-)

Hope this helps, sorry if not.