MySQL error 2002 when use INSERT INTO

Question

I have a problem with mysql. When I execute this, that give me an error: No such file or directory 2002, but SELECT query work perfect and print typ on the screen. What can I solve this problem?

<?php
$con=mysqli_connect("db4free.net","****","****","*****");
if (mysqli_connect_errno($con))
{
   echo "Failed to connect to MySQL: " . mysqli_connect_error();
}

$username = $_GET['username'];
$password = $_GET['password'];
$result = mysqli_query($con,"SELECT Typ FROM Uzytkownik where Login='$username' and Haslo='$password'");

$row = mysqli_fetch_array($result);
$data = $row[0];
if($data){
echo $data;
}

$que =  "INSERT INTO Uzytkownik VALUES ('10','tr','t','a')";
if( !mysql_query($que) ) {
     echo  "ERROR!!: ".mysql_error().mysql_errno() ;
}
mysqli_close($con);
?>

Result of this:

testERROR!!: No such file or directory2002

EDIT Sorry, I pasted wrong code, but it was already changed

Answer 1

You cannot mix mysqli_* functions with mysql_* functions.

replace this:

if( !mysql_query($que) ) {
     echo  "ERROR!!: ".mysql_error().mysql_errno() ;
}

with

if( !mysqli_query($con, $que) ) {
     echo  "ERROR!!: ".mysqli_error($con) ;
}