plugin option has gone in the admin panel

[subzonline]

now im not the admin that installed vbulletin. im the admin that uses it with him. he trusts me wiv evrything on the site. and i went on today and i go to admin panel. and the plugin system has gone. lol wierd. like i cant select it from the list on the left because its vanished. reminds me of the time i was cooking and i went out to get something den i came back and the food had gone from the bowl. but later on i found out it was my cat.