Application+places+system missing in panel
I have searched to resolve the subjected problem but could not find the solution.
The problem is that on the top panel, Application, Places and System menu is missing, how to resolve it ?
Anyhow, the googlechrome icon, and other menu like wifi, time and date, user name et power button at the right side of panel are always displayed.
Could you know about this problem ? please suggest how to solve it ?
NahkNarmi Ubuntu14.04 LTS Dell LATITUDE | E5400 32 bits | 2.00 GHz 1 GB RAM | 120 HDD