this if shud insert into the field max where thers 1 field but it doesnt can any one help me. Also can u help me delte the old one first.

PHP Code:

<?php
$guest5 = "SELECT `guests` FROM msn_cache"; 
$result_guest5 = @mysql_query($guest5); 
while (list ($guests) = @mysql_fetch_row($result_guest5))
echo "Online Now: $guests<br>"; 
$maxsql = "SELECT `max` FROM msn_max_online"; 
$result_max = @mysql_query($maxsql); 
while (list ($max) = @mysql_fetch_row($result_max))
echo "Most Online: $max <br>";
if ($guests > $max) 
{ 
$query = mysql_query("INSERT INTO msn_max_online (`max`) VALUES ('$guests')");
mysql_db_query('$query');
} 
?>

why u want to delete? just update that record, but first let's solve the problem.
- remove that @ for now, it's supressing the err msg if there is any.
- use mysql_error().
report if there is any error.