Oracle Database Discussions

I've tried to connect PHP 5.2.14 to Oracle 10g XE without any success.
I'm running Windows 7 with Apache 2.2.As an installation guide i've followed: http://wiki.oracle.com/page/PHP+Oracle+FAQ .
As i try to connect using:
$conn = oci_connect("HR", "myhrpassword", "//localhost/XE");

In php.ini i've uncommented the line: "extension=php_oci8.dll" and the: "extension_dir = "c:\php\ext" under the "On windows:" line.
I get this error: "Warning: oci_connect(): ORA-12154: TNS:could not resolve the connect identifier specified in c:\apache2.2\htdocs\test.php"
I've verified that OCI8 is installed by running: "<?php phpinfo(); ?>". Under OCI8 i have: http://img251.imageshack.us/img251/1660/oci8.jpg

I've verified my tnsnames.ora and it looks like this:
"
XE =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = Dan-PC)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = XE)
)
)

EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
)
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
)
)

ORACLR_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
)
(CONNECT_DATA =
(SID = CLRExtProc)
(PRESENTATION = RO)
)
)
"

My sqlnet.ora is "SQLNET.AUTHENTICATION_SERVICES = (NONE)" (was NTS but still didn't worked).

I don't know what to do more. I've tried allmost everything but can't get it to work.

Kind Regards,
Cearnau Dan