Help me.

[MrStealth]

Hello i have problem i create website and say this:

Fatal error: Call to undefined function odbc_connect() in /home/ni005500/www_root/includes/config.php on line 34

what is error?

$conn = odbc_connect('Driver={SQL Server};Server='.$HOST.';', $USER, $PASSWORD);
$result = odbc_exec($conn, 'Select * FROM TGLOBAL_GSP.dbo.TACCOUNT');