query not working . cant work out why

the top query works no problem .
second one does not update the database.


$res=mysql_query("UPDATE lotto SET jackpot='".($lot[0]+10)."'");
$res=mysql_query("UPDATE users SET lotto='1' WHERE id='".$who."'");


any ideas. ??

fixed it myself .topic closed

Please post the solution to the problem.