Issue with file download from BLOB type data

Question

i have been using this for a while, with no problems, including on hosted machines.
the upload to the database works fine.. not the issue, and the download script also works fine, on the local WAMP machine.
but once moved to the server it fails.. the query does not work.
i have a feeling that it is something to do with the managed hosting i am using, but they say no, i have tried it on 2 seperate hosted machines (different providers), with no joy.
if i run the select query on the hoisting server via phpmyadmin, the query runs ok.
any suggestions as to what may be causing the problem on the server compared to the local WAMP machine?
i really don't know where to start looking, or where to point the hosting company.
This is the php code to download the blob data, works fine on local WAMP setup, browser asks if you want to save the file/open etc. as expected.
<?php require_once('Connections/connTracker.php'); ?>
<?php
// if id is set then get the file with the id from database
if(isset($_GET['docindex']))
           {$id    = $_GET['docindex'];
        $query = "SELECT document_name, document_type, document_size, document_content " .
           "FROM tracker_documents WHERE document_index = ".$id;
*** seems to be failing here when running the query ***
$result = mysql_query($query) or die('Error, query failed');
           list($name, $type, $size, $content) = mysql_fetch_array($result);
     header("Cache-Control: maxage=1"); //In seconds
   header("Pragma: public");
     header("Content-length: $size");
           header("Content-type: $type");
           header("Content-Disposition: attachment; filename=$name");
           echo html_entity_decode ($content);}
exit;
?>

Answer 1

Hi Gun,
You are the only one responded to my issue. I have allocated some points.
Yes. I have checked the assignment in CRM organizational model.
I did download the org. structure from ECC 5.0
All objects including sales offices are activated for determination and I have verified with green light
As per your suggestion if the sales area data is not matched between the two systems, then how come the error will not reappear during the bdoc reprocess?
What is missing during the first time bdoc process? Looks something is missing for validation module?
Any inputs?
Thanks,
Raj