Edit link on widget does'nt show

Hi, this is my first time to installing Elgg 1.5

I just realize, after i'm installing many plugin then log out, then log in back with user status, i cannot see the link of edit on widget / profile then i cannot delete the notification message from my inbox.

I've just read the same problem right here : http://community.elgg.org/pg/plugins/dave/read/86460/sign-in-with-twitter

But i did'nt install that plugin (sign-in-with-twitter).

Does anyone can help me with a solution.