Development Tools & DevOps

i got error like this

Warning: oci_connect() [function.oci-connect]: OCIEnvNlsCreate() failed. There is something wrong with your system - please check that PATH includes the directory with Oracle Instant Client libraries in D:\Siregar\Study\Sem IV\IBAD\index.php on line 10

I use oci8.dll from oracle 10g in my php, and now i want to connecting my php to oracle 6i which is exist on remote server.

my configuration is like this,
$db='(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = 178.178.2.82)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = DBMD)
)
)';

$connection = oci_connect('usermd', 'honda', $db);
if (!$connection) {
$e = oci_error();
echo htmlentities($e['message']);

and like this,
$conn = oci_connect('usermd', 'honda', '178.178.2.82/XE');

if (!$conn) {
trigger_error("Could not connect to database", E_USER_ERROR);
}

but it didn't work well.

please help me to solve this problem.,thanks in advanced.