[mariocaz]

Thank you great Dismounted, perfect, I will put the prefix in the config.php file and finally do I change the permissions of the folder ? /includes/datastore/datastore_cache.php Right now is 777 but maybe for protection of my forum I have to change that again, if yes please tell me the correct permissions tu put again in that folder.

So this step is very insecure ?? , now I am very worried because TECK told me that. (thank you!)

1. Store CSS StyleSheets as Files

By default, vBulletin will store the CSS of your pages as HTML within the head of the document. This, when taken over thousands of pages, can be quite a heavy burden.

Storing CSS Stylesheets as files will allow users/spiders to cache the CSS as a file, and make each page smaller, HTML wise, giving your server a bit of a breather.

To begin, ensure your forums/clientscript/vbulletin_css directory is chmod 777 so the stylesheet files can be created.
Next, in the AdminCP, select the vBulletin Options menu then vBulletin Options.
Select Style and Language Options.
Set "Store CSS Stylesheets as Files?" to Yes.
Click Submit.

Because I did it and have the permission in that folder (/clientscript/vbulletin_css) to 777, so I have to change it urgently ?? and also go to my ACP and put NO in the Set "Store CSS Stylesheets as Files option.

Thank you again for all your awesome help.