Try this
if ((isset($_POST["MM_insert"])) && ($_POST["MM_insert"] == "form1")) {
$insertSQL = sprintf("INSERT INTO SUBSCRIBER_T (FULL_NAME, EMAIL_ADDR, CREATE_DT) VALUES (%s, %s, %s)",
GetSQLValueString($_POST['FULL_NAME'], "text"),
GetSQLValueString($_POST['EMAIL_ADDR'], "text"),
now(), "date"));
mysql_select_db($database_test, $test);
$Result1 = mysql_query($insertSQL, $test) or die(mysql_error());