How do I install Plugin Architecture in Freebsd8?

[ericx1982]

Hi All

I have The cacti installed on Freebsd 8.0, the version is 0.87g. I wonder how to install plugin Architecture for the Cacti 0.87g in Freebsd8. I followed the official document and did once before, but I can not see new entry named "Plugin Management" displayed in the configuration pane. I do not know what I did incorrectly. Can someone help me? Thanks