Help, not inserting records

[faxtion]

I have been banging my head against the wall for about a week now trying to work out a solution but can not seem to get to one, could anyone help me out.
MY script selects all users id from users db then for each id it fetchs their status timelime from twitter, and then it checks if that status is stored in the table for their user id if it exists it updates other wise it inserts a new record to the users table.

But for some reason this script was working when I had about 10 users in the db, but I know have 18 users and it does not add the record to the table when the insert query is run. I know the query is working fine as I echoed the output to the screen.

Can any body help?
Code Below

$xml = new SimpleXMLElement($data);
foreach($xml->status as $results) {
$tweet = mysql_escape_string($results->text); 
$datetime = $results->created_at;
$queryselectresult = "SELECT * FROM letwitour.".$id." WHERE statusid='$results->id'"; 
$selectresult = mysql_query($queryselectresult, $conn)or die('Error :666 ' . mysql_error());
if (mysql_num_rows($selectresult)) {
$updatetweetSQL = (" 
UPDATE 
letwitour.".$id ." 
SET 
statusid = '$results->id', 
tweet_text = '$tweet', 
create_time_date = '$results->created_at' 
WHERE 
statusid = '$results->id'");
#mysql_query($updatetweetSQL,$conn) or die('Error 3: ' . mysql_error()); 
mysql_query($updatetweetSQL, $conn)or die('Error 3: ' . mysql_error());
} else {
$insertintoTB = "INSERT IGNORE INTO letwitour.".$id ." 
VALUES ('NULL','$results->id','$tweet','$results->created_at')" ; 
mysql_query($insertintoTB, $conn) or die('Error 2: ' . mysql_error());
$count ++; 
}
#echo $results->text; 
#echo $results->id .'<br /><br />'; 
}

[vincevincevince]

First of all, read upon mysql_real_escape_string().
Note, depending on database table type, mysql_num_rows() may not be accurate.
Try using something like:

INSERT INTO x (`user`,`feedtext`) VALUES ('$user','$feedtext') ON DUPLICATE KEY UPDATE `feedtext` = '$newtext'