Fatal error when connect with sql server 2008

[Dazzel]

Ticket #744 by @phuocdaivl08

try {
    $db  = new fDatabase('mssql', 'TEST', 'sa', '123456','PHUOCDAI-PC\SQLEXPRESS');
    // Please note that calling this method is not required, and simply
    // causes an exception to be thrown if the connection can not be made
    $db->connect();

} catch (fAuthorizationException $e) {
    $e->printMessage();
}

Fatal error: Uncaught exception 'fConnectivityException' with message 'Unable to connect to database - hostname not found' in C:\AppServ?\inc\flourish\fDatabase.php:2057 Stack trace: #0 C:\AppServ?\inc\flourish\fDatabase.php(797): fDatabase→handleConnectionErrors(Array) #1 C:\AppServ?\www\posttin\c.php(31): fDatabase→connect() #2 {main} thrown in C:\AppServ?\inc\flourish\fDatabase.php on line 2057

Can you help me? How to fix this error? I'm from VietNam?. My English is not good!