Plugin issue

Hi, I'm trying to install a plugin (Security), I've followed this tutorial http://wiki.ocsinventory-ng.org/index.php?title=Plugins:Security step by step but the Plugin Manager tab doesn't show me this plugin to proceed the installation.

it seems strange because ocsinventory.log says that it's all ok.

EXECUTABLE PLUGIN => Searching for VBS script(s) in folder <C:\Program Files (x86)\OCS Inventory Agent\plugins>
    EXECUTABLE PLUGIN => Found executable plugin <security.vbs>
    EXECUTABLE PLUGIN => Plugin <security.vbs> executed successfully
    EXECUTABLE PLUGIN => Searching for executable(s) in folder <C:\Program Files (x86)\OCS Inventory Agent\plugins>

I hope that you can help me.