unable to chaneg smpt user,paswd,port

[ayubn]

**hi

i hv just downloaded this code, its nice but i am unable to solve this issue

A PHP Error was encountered
Severity: Warning

Message: mail(): Failed to connect to mailserver at "localhost" port 25, verify your "SMTP" and "smtp_port" setting in php.ini or use ini_set()

Filename: libraries/Email.php

Line Number: 1888

Backtrace:

File: C:\xampp\htdocs\login17\application\controllers\Main.php
Line: 515
Function: send

File: C:\xampp\htdocs\login17\index.php
Line: 315
Function: require_once

i change the settings in libraries/email.php but it show still same error so plz tell me where to change these things