alguien ve algo malo???

[fmb1982]

<?php
$peri=$_POST['per'];
$enca=$_POST['enc'];
$noti=$_POST["not"];
$dia=date("d");
$mes=date("m");
$ano=date("Y");
echo $peri.$enca.$noti;

$conectID = mssql_connect("CTEI-PRESARIO","Administrador","12345");
mssql_select_db("ccp_usr");
$sql=("INSERT INTO news(n_enca,n_peri,n_info,n_dd,n_dm,n_da) VALUES $enca,$peri,$noti,$dia,$mes,$ano");
mssql_query($sql);
?>


Ahora me marca......Warning: mssql_query() [function.mssql-query]: message: Line 1: Incorrect syntax near 'A'. (severity 15) in C:\xampplite\htdocs\guarda_noticias.php on line 20

Warning: mssql_query() [function.mssql-query]: Query failed in C:\xampplite\htdocs\guarda_noticias.php on line 20