you are right! I want the Suppliers to be able to let user to configure but in my OpenERP don't know why can't see it although I already install the purchase module. Please advise.

I'm afraid there is something wrong with your database module.. Have you tried to update the module or pull the latest version of OpenERP?

Actually previously I have saw the supplier info but don't know since when it disappear. I have check through the access right setting, because I suspect is that problem. However, until now still no work yet. I haven't try on update the module or pull the latest version of OpenERP yet. Can you guide me how to do so? Or any way that can activate back the supplier info in product module? Please advise. Thank you so much.

My first suggestion is, try to make a new database and see if the supplier info come out or not... If it still doesnt come out, try to update your database, this will help you http://help.openerp.com/question/1010/ubuntubazaar-update-openerp-through-command-line/

Thank you so much for your suggestion! I already try to create a new database with demo data, the supplier info is appear. But I no sure why my current database that using by user can't see the supplier info in product module. Actually before that I still can see the supplier info in my current database but don't know why since when it disappear already. I very curious and don't know where can activate it back. I have try to match the access level from my current database with the new create database but it still the same. That's why I headache and still can't find out the solution. :(

I think it's not about access level, somehow your database is broken (or bug? or is there any sequence to install module?) because i found some several cases like you where the field in the system suddenly missing..

Ya, that's why I keep search through the web and look for the solution but no luck at all. My temporary solution now is just go to debug mode, then manage view then add in the suppliers info myself. I hope who have found the bugs and solution please inform me so that I can know actually what is happening. Thank you so much.