Can't see Plugins :(

So i recently started a cracked 1.8 server to play with friends, then after we played I realized that its cracked so people could log in with someonelses account. I went to the my server page and changed vanilla 1.8 to craft bukkit 1.7.2 to put the authme plugin then went to the files and plugins page,but, there were no plugins there was only "FILES" written in white in a blue box, nothing else, help please.

Alright thanks