CodeIgniter 3 + SQL Server + Windows 10

我有一个与CodeIgniter和sqlserver 2008一起工作的项目，我将我的pc更新到windows 10然后停止工作，php的sqlserver驱动程序配置和我的php ini显示它，代码也连接到sqlserver，但现在当我试图做一个查询它给我假所以这段代码:

 $this->db->select('*')->from('distritos')->get()->result();
Fatal error: Call to a member function result() on a non-object in C:'

总是像sqlserver不再工作，但无法修复它。

Php info show

PDO
PDO support enabled
PDO drivers mysql, pgsql, sqlite, sqlsrv
pdo_sqlsrv
pdo_sqlsrv support  enabled
Version 3.0.2.2R (Unofficial)
Unofficial Changes  Works with Native Clients 11/10/9
sqlsrv
sqlsrv support  enabled
Version 3.0.2.2R (Unofficial)
Unofficial Changes  Works with Native Clients 11/10/9

编辑:这是我的错误，不能连接

Unable to connect to your database server using the provided settings.
Filename: C:/www/***/system/database/DB_driver.php
Line Number: 436