Plugins load failed!

hello everyone …
I’ve done the following : manual installation, copying plugins to the server by using FTP and SCP, adding them by admin web console ,
and nothing happened !!

i’ve tried with (service start and stop)

Are there any issues?! , i’m using openfire 3.9.3 btw, how can I solve this problem ?.

the plugins appear in the plugin directory but nothing works.