hello i want to install data life engine but install time showing a error.

Code:
MySQL error in file: /engine/classes/mysqli.class.php at line 52
Error Number: 1
The Error returned was:
Access denied for user '****'@'localhost' (using password: YES)
SQL query:
i have checked online but i didint find solution.

here is the code

PHP Code:
<?php
/*
=====================================================
 DataLife Engine - by SoftNews Media Group 
-----------------------------------------------------
 English version by DLEVIET (http://dleviet.com)
-----------------------------------------------------
 Copyright (c) 2004,2012 SoftNews Media Group
=====================================================
 This code is protected by copyright
=====================================================
 File: mysqli.class.php
-----------------------------------------------------
 Purpose: Class MySQLi to work with the database
=====================================================
*/

if(!defined('DATALIFEENGINE'))
{
  die(
"Hacking attempt!");
}

class 
db
{
    var 
$db_id false;
    var 
$query_num 0;
    var 
$query_list = array();
    var 
$mysql_error '';
    var 
$mysql_version '';
    var 
$mysql_error_num 0;
    var 
$mysql_extend "MySQLi";
    var 
$MySQL_time_taken 0;
    var 
$query_id false;

    
    function 
connect($db_user$db_pass$db_name$db_location 'localhost'$show_error=1)
    {
        
$db_location explode(":"$db_location);

        if (isset(
$db_location[1])) {

            
$this->db_id = @mysqli_connect($db_location[0], $db_user$db_pass$db_name$db_location[1]);

        } else {

            
$this->db_id = @mysqli_connect($db_location[0], $db_user$db_pass$db_name);

        }

        if(!
$this->db_id) {
            if(
$show_error == 1) {
                
$this->display_error(mysqli_connect_error(), '1'); ****here is the problem***** line 52
            
} else {
                return 
false;
            }
        } 

        
$this->mysql_version mysqli_get_server_info($this->db_id);

        if(!
defined('COLLATE'))
        { 
            
define ("COLLATE""cp1251");
        }

        
mysqli_query($this->db_id"SET NAMES '" COLLATE "'");

        return 
true;
    }
    
    function 
query($query$show_error=true)
    {
        
$time_before $this->get_real_time();

        if(!
$this->db_id$this->connect(DBUSERDBPASSDBNAMEDBHOST);

        if(!(
$this->query_id mysqli_query($this->db_id$query) )) {

            
$this->mysql_error mysqli_error($this->db_id);
            
$this->mysql_error_num mysqli_errno($this->db_id);

            if(
$show_error) {
                
$this->display_error($this->mysql_error$this->mysql_error_num$query);
            }
        }
            
        
$this->MySQL_time_taken += $this->get_real_time() - $time_before;
        
//            $this->query_list[] = array( 'time'  => ($this->get_real_time() - $time_before), 
//                                         'query' => $query,
//                                         'num'   => (count($this->query_list) + 1));
        
        
$this->query_num ++;

        return 
$this->query_id;
    }
    
    function 
get_row($query_id '')
    {
        if (
$query_id == ''$query_id $this->query_id;

        return 
mysqli_fetch_assoc($query_id);
    }

    function 
get_affected_rows()
    {
        return 
mysqli_affected_rows($this->db_id);
    }

    function 
get_array($query_id '')
    {
        if (
$query_id == ''$query_id $this->query_id;

        return 
mysqli_fetch_array($query_id);
    }
    
    function 
super_query($query$multi false)
    {

        if(!
$multi) {

            
$this->query($query);
            
$data $this->get_row();
            
$this->free();            
            return 
$data;

        } else {
            
$this->query($query);
            
            
$rows = array();
            while(
$row $this->get_row()) {
                
$rows[] = $row;
            }

            
$this->free();            

            return 
$rows;
        }
    }
    
    function 
num_rows($query_id '')
    {
        if (
$query_id == ''$query_id $this->query_id;

        return 
mysqli_num_rows($query_id);
    }
    
    function 
insert_id()
    {
        return 
mysqli_insert_id($this->db_id);
    }

    function 
get_result_fields($query_id '') {

        if (
$query_id == ''$query_id $this->query_id;

        while (
$field mysqli_fetch_field($query_id))
        {
            
$fields[] = $field;
        }
        
        return 
$fields;
       }

    function 
safesql$source )
    {
        if(!
$this->db_id$this->connect(DBUSERDBPASSDBNAMEDBHOST);

        if (
$this->db_id) return mysqli_real_escape_string ($this->db_id$source);
        else return 
addslashes($source);
    }

    function 
free$query_id '' )
    {

        if (
$query_id == ''$query_id $this->query_id;

        @
mysqli_free_result($query_id);
    }

    function 
close()
    {
        @
mysqli_close($this->db_id);
    }

    function 
get_real_time()
    {
        list(
$seconds$microSeconds) = explode(' 'microtime());
        return ((float)
$seconds + (float)$microSeconds);
    }    

    function 
display_error($error$error_num$query '')
    {
        if(
$query) {
            
// Safify query
            
$query preg_replace("/([0-9a-f]){32}/""********************************"$query); // Hides all hashes
        
}

        
$query htmlspecialchars($queryENT_QUOTES'ISO-8859-1');
        
$error htmlspecialchars($errorENT_QUOTES'ISO-8859-1');

        
$trace debug_backtrace();

        
$level 0;
        if (
$trace[1]['function'] == "query" $level 1;
        if (
$trace[2]['function'] == "super_query" $level 2;

        
$trace[$level]['file'] = str_replace(ROOT_DIR""$trace[$level]['file']);

        echo <<<HTML
<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>MySQL Fatal Error</title>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1251" />
<style type="text/css">
<!--
body {
    font-family: Verdana, Arial, Helvetica, sans-serif;
    font-size: 11px;
    font-style: normal;
    color: #000000;
}
.top {
  color: #ffffff;
  font-size: 15px;
  font-weight: bold;
  padding-left: 20px;
  padding-top: 10px;
  padding-bottom: 10px;
  text-shadow: 0 1px 1px rgba(0, 0, 0, 0.75);
  background-color: #AB2B2D;
  background-image: -moz-linear-gradient(top, #CC3C3F, #982628);
  background-image: -ms-linear-gradient(top, #CC3C3F, #982628);
  background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#CC3C3F), to(#982628));
  background-image: -webkit-linear-gradient(top, #CC3C3F, #982628);
  background-image: -o-linear-gradient(top, #CC3C3F, #982628);
  background-image: linear-gradient(top, #CC3C3F, #982628);
  filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#CC3C3F', endColorstr='#982628',GradientType=0 ); 
  background-repeat: repeat-x;
  border-bottom: 1px solid #ffffff;
}
.box {
    margin: 10px;
    padding: 4px;
    background-color: #EFEDED;
    border: 1px solid #DEDCDC;

}
-->
</style>
</head>
<body>
    <div style="width: 700px;margin: 20px; border: 1px solid #D9D9D9; background-color: #F1EFEF; -moz-border-radius: 5px; -webkit-border-radius: 5px; border-radius: 5px; -moz-box-shadow: 0px 0px 8px rgba(0, 0, 0, 0.3); -webkit-box-shadow: 0px 0px 8px rgba(0, 0, 0, 0.3); box-shadow: 0px 0px 8px rgba(0, 0, 0, 0.3);" >
        <div class="top" >MySQL Error!</div>
        <div class="box" ><b>MySQL error</b> in file: <b>
{$trace[$level]['file']}</b> at line <b>{$trace[$level]['line']}</b></div>
        <div class="box" >Error Number: <b>
{$error_num}</b></div>
        <div class="box" >The Error returned was:<br /> <b>
{$error}</b></div>
        <div class="box" ><b>SQL query:</b><br /><br />
{$query}</div>
        </div>        
</body>
</html>
HTML;
        
        exit();
    }

}


?>
please help me to solve this issue thanks