mysql_query problem

[CYL1981]

Hi,

I get an error:

Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in /.../.../select.php on line 11
writing=Error

but i dont know what is wrong.. please take a look at my code:

<?php
//Capture data from $_POST array
$sender_id = $_POST['sender_id'];

//Connection to database
$connect = mysql_connect("myhost","myname","mypass");
mysql_select_db ("blablabla1", $connect);
//Perform the query
$result = mysql_query("SELECT naam_verzender, tekst1, tekst2 FROM Ecards WHERE ID=$sender_id");

while($row=mysql_fetch_array($result))
    {
            echo "naam_verzender=$row[naam_verzender]&tekst1=$row[tekst1]&tekst2=$row[tekst2]&";
    };

if($result) echo "writing=Ok";
else echo "writing=Error";
?>

thx,