The table name and the fields are ok.
$b_name = mysql_real_escape_string(htmlentities($_POST['b_name']));
// Updates Offers
$of1 = mysql_real_escape_string(htmlentities($_POST['of1']));
$of2 = mysql_real_escape_string(htmlentities($_POST['of2']));
$of3 = mysql_real_escape_string(htmlentities($_POST['of3']));
$of4 = mysql_real_escape_string(htmlentities($_POST['of4']));
$of5 = mysql_real_escape_string(htmlentities($_POST['of5']));
$sql = "INSERT INTO `business_offers` (of1, of2, of3, of4, of5, username, b_name) VALUES ('{$of1}', '{$of2}', '{$of3}', '{$of4}', '{$of5}','{$_SESSION['username']}', '{$b_name}')";
mysql_query($sql);
// WORKS
$ev1 = mysql_real_escape_string(htmlentities($_POST['ev1']));
$ev2 = mysql_real_escape_string(htmlentities($_POST['ev2']));
$ev3 = mysql_real_escape_string(htmlentities($_POST['ev3']));
$ev4 = mysql_real_escape_string(htmlentities($_POST['ev4']));
$ev5 = mysql_real_escape_string(htmlentities($_POST['ev5']));
$sql = "INSERT INTO `business_events` (ev1, ev2, ev3, ev4, ev5, username, b_name) VALUES ('{$ev1}', '{$ev2}', '{$ev3}', '{$ev4}', '{$ev5}','{$_SESSION['username']}', '{$b_name}')";
mysql_query($sql);