Description:
------------
I have created a Linked server(MSSQL 2000 server) at an Interbase database and works perfectly from Querry Analyzer
The problem occurs when I try to execute the query from php (by using  query); I've got an error : "DB Error: unknown error".
It seems that php doesn't allows to access remote linked servers!


Reproduce code:
---------------
$db =& DBWrapper::get();

.......
$sql =
	"select U.*
	 from   OPENQUERY(FB, 'select * from users') U
	 where  U.USER_ACCOUNT = " . "MGI";
	$result =& $db->query($sql);
if (PEAR::isError($result)) {
		die($result->getMessage());
	}

Expected result:
----------------
no error

Actual result:
--------------
"DB Error: unknown error".