VB Upgrade problem,,,,,

[Khalid-B]

Hello.
I am trying to upgrade with : 3.6.8 Patch Level 1 but cant
I have overwrited both flies in include folder , here are files

* includes/class_bbcode.php
* includes/version_vbulletin.php


but its not work , i am still at >> Latest version available: 3.6.8 Patch Level 1. You are currently running vBulletin version 3.6.8.

so need help about this .
Please help me and tell me whats wrong with files.

Thanks

--------------- Added 1193228377 at 1193228377 ---------------

--------------- Any help plz -----------------