Call to a member function row() on boolean

yes tried that reset_query() between the queries and in every other possible line. but the Uncaught exception error keeps obssessing over the "row_array()" or even "result_array()":

An uncaught Exception was encountered
Type: Error

Message: Call to a member function row_array() on boolean

Filename: /home/tauenjic/code.tauenji.com/install/application/models/Login_model.php

Line Number: 9

Backtrace:

File: /home/tauenjic/code.tauenji.com/install/application/controllers/Login.php
Line: 101
Function: cek_login

File: /home/tauenjic/code.tauenji.com/install/index.php
Line: 326
Function: require_once

For some reason its reacting to the row_array()
$query=$this->db->get_where('admin', $where)->row_array();