mysql errors on page and admin panel

Help please

I am getting the following errors on my website:

Deprecated: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead in /home/#####/public_html/system/database/mysql.php on line 6
Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /home/#####/public_html/system/database/mysql.php:6) in /home/#####/public_html/system/library/session.php on line 11Warning: Cannot modify header information - headers already sent by (output started at /home/#####/public_html/system/database/mysql.php:6) in /home/#####/public_html/index.php on line 181Warning: Cannot modify header information - headers already sent by (output started at /home/#####/public_html/system/database/mysql.php:6) in /home/#####/public_html/system/library/currency.php on line 45

In the admin panel, I cannot get it to load after logging in and receive these errors:

Deprecated: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead in /home/#####/public_html/system/database/mysql.php on line 6
Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /home/#####/public_html/system/database/mysql.php:6) in /home/#####/public_html/system/library/session.php on line 11Warning: Cannot modify header information - headers already sent by (output started at /home/#####/public_html/system/database/mysql.php:6) in /home/#####/public_html/system/library/currency.php on line 45Warning: Cannot modify header information - headers already sent by (output started at /home/#####/public_html/system/database/mysql.php:6) in /home/#####/public_html/vqmod/vqcache/vq2-system_engine_controller.php on line 28Warning: Cannot modify header information - headers already sent by (output started at /home/#####/public_html/system/database/mysql.php:6) in /home/#####/public_html/vqmod/vqcache/vq2-system_engine_controller.php on line 29

I have tried:

To solve this, open the following file:
system > library > session.php

Find:
session_start();

Replace with:
session_save_path(“/tmp”); session_start();

Which fixes nothing.

I have also attempted updating to the new mysqli.php file which causes more errors.

Any ideas on how to fix?

Thanks

this basically answers your question, you ONLY have to switch to MYSQLI, in your BOTH config.php
Files, if you already have an OC Version, (believed 1.5.5.1up) already including/containing the
mysqli.php file by default.
http://forum.opencart.com/viewtopic.php?f=19&t=155393

Ernie
hitline.info/shop/

IP_CAM, you are a lifessaver.

After trying all of the mysqli files I started on the mmsqli. The file in the main folder works like a charm.