I Can't connect to my WEB

[makong]

my web it says:
Fatal error: Call to undefined function mssql_pconnect() in C:\xampp\htdocs\conec.php on line 5

this code:
global $link;
if (!($link = mssql_pconnect("RADIANTECF1","sa","simeimporta")))

I change it but still can't connect :
<?php
function Conectarse()
{
global $link;
if (!($link = mssql_pconnect("C-1\SQLEXPRESS","sa","123456")))
{
exit();
}
if (!mssql_select_db("UserLogin",$link))
{
exit();
}
return $link;
}
Conectarse();

$accdir="C:\\Server\\DBSRV\\account"; //Escribe aqui el directorio donde se guardaran tus cuentas.
$usergmail = "AQUI TU@EMAIL.com"; //Escribe aqui tu dirección de Gmail.
$passgmail = "AQUI TU CONTRASEÑA"; //Escribe aqui la contraseña de tu cuenta Gmail.
$tweb = "Tantra GT"; //Aqui el nombre de tu web o servidor.
$dominio = "tantra-gt.laweb.es"; //Escribe aqui el nombre de tu dominio sin el "http://"

?>

please Help me !!!!

[MentaL]

[Fixtures]

check at line 5

[makong]

|This is the line 5

this code:
global $link;
if (!($link = mssql_pconnect("RADIANTECF1","sa","simeimporta")))


and change it to this

global $link;
if (!($link = mssql_pconnect("C-1\SQLEXPRESS","sa","123456")))

but still won't work

can someone show me how to connect it please