“Notification Area” in my screen 2 and 3

Hello Experts,
I switched my Maverick to Natty to learn some of it features and gain additional knowledge with it.
I tried to apply some of my configuration on a new system with 3 monitors. In Monitor 2 an error appears after creating a new panel and adding applets to it. Applied to Monitor 3 same error faced.
What could be the cause these were it is functional in Maverick?
Any ideas are greatly appreciated. Thanks!
Error appears in my screen 2 and 3.

Error:
Notification Area has quit unexpectedly
If you reload a panel object, it will automatically be added back to the panel
