An error occurred translating the query string to UTF-16: No mapping for the Unicode

Hi All,
I have a problem when using CI 2.14 or 2.1.0 with SQL Server 2012. I use sqlsrv for dbdriver. I got error massage like this when try to Login in my application. This error was happened when i was tried to input my password form with number, symbols and another else except character.If I only input password form with character everthing still working good. I have used google for solved my problem and only got this tutorial but I still got error when I tried 

http://stackoverflow.com/questions/91787...odeigniter

Code:

A Database Error Occurred
Error Number: IMSSP
An error occurred translating the query string to UTF-16: No mapping for the Unicode character exists in the target multi-byte code page. .
SELECT * FROM tbl_mst_user WHERE USER_ID = 'opsup4' AND USER_PASSWORD = '���hbhb'
Filename: C:\xampp\htdocs\kerjaan\TreasuryOperation\system\database\DB_driver.php
Line Number: 330

This is my Model when insert to database

PHP Code:

public function validate(){
        $USER_ID = $this->security->xss_clean($this->input->post('USER_ID'));
        $USER_PASSWORD = $this->security->xss_clean($this->input->post('USER_PASSWORD'));
        $EnkripsiUserPassword=Enkripsi($USER_PASSWORD);
        $this->dbuser->where('USER_ID', $USER_ID);
        $this->dbuser->where('USER_PASSWORD', $EnkripsiUserPassword);
        // Run the query
        $query = $this->dbuser->get('tbl_mst_user');
        if($query->num_rows == 1)
        {
            // If there is a user, then create session data
            $row = $query->row();
            $data = array(
                    'USER_IDX' => $row->USER_IDX,
                    'USER_ID' => $row->USER_ID,
                    'USER_NAME' => $row->USER_NAME,
                    'UNIT_ID' => $row->UNIT_ID,
                    'DEPARTMENT_ID' => $row->DEPARTMENT_ID,
                    'DIVISION_ID' => $row->DIVISION_ID,
                    'BRANCHBSMI_ID' => $row->BRANCHBSMI_ID,
                    'GROUP_NAME' => $row->GROUP_NAME,
                    'GROUP_DESCRIPTION' => $row->GROUP_DESCRIPTION,
                    'validated' => true
                    );
            $this->session->set_userdata($data);
            return true;
        }
        // If the previous process did not validate
        // then return false.
        return false;
    } 


And this my file in Third Party folder for Encrypt and Decrpty User input password

PHP Code:

sory edited for any reason :D 


My question, is this a bug from CI driver for SQL Server ? And how to solved this problem, any advice to me ? This is make me painful

Thank you