Thanks for helping me...

You gave me an idea with that, and I check the folder by typing the url into the address bar of my browser, and yes nginx wasn't able to get access into the folder "includes" I had miss to two - three folder that permissions are wrong, so vbulletin wasn't able to see the file of the folder.. Now I fix the first problem but when I am trying to save updates on AJAX thread field,(admincp) I got the following email from localhost,
Code:
Invalid SQL:
UPDATE forum SET
### UPDATE QUERY GENERATED BY fetch_query_sql() ###
`dbtech_ajaxthreads_cannotautoupdate` = '0'
WHERE forumid = 1;
MySQL Error : Unknown column 'dbtech_ajaxthreads_cannotautoupdate' in 'field list'
Error Number : 1054
Is required to set columns or table in mysql databases ?? Also, keep in mind that I closed port 3306 for world, so only localhost can be able to handle/access on database so a good idea to know the file of the mod, (as now I am thinking, it's 4:30am here

) that's call mysql database to add column rows (or more general a new table) with that way I can configure , user & pass of database, and the port number proper, so database be able to respond back. Now may I am wrong or something, I really don't know how vbulletin mod's works, basically I am trying to understand. So if you have any ideas please let me know, if you need further informations, feel free to ask me

..... Oh at the end, please don't give the proper attention to my words, may confuse you

Always thinking the most impossible situations, and always problems are more easier :P
Thanks for your support!!