Network Manager missing from Notification Area

go to system -preference - main menu -scroll down the list to administrator then check the box by network tool then see it this the tool/ program you need .

no no i need the applet in gnome panel . I think it is lost after i updated the ubuntu. I am not sure.

oh ! you mean the the icon for the internet . mine fails to load on start up some times . i just restart my pc and it returns . this also happens with my shut down icon .

if restart does not work do this
Open the Terminal.
Once the Terminal window opens, enter the following command at the prompt:
gconftool - -recursive-unset /apps/panel
(Remember: There should be no spaces between the two dashes before shutdown.)
Then enter the next command:
rm -rf ~/.gconf/apps/panel
And enter one more command:
pkill gnome-panel

I tried it and my gnome panel suddenly disappears and appears. Icons Which I deleted Came back to my panel but Network Icon did not come.
What to Do ? Pls Help Me

go to system -preference - startup application scroll down the list see that the little box by startup manager is check

 oh sh== ! that is network manager not startup manager !!!

I have just set up my system to log onto my network AT BOOT.
As soon as I did this, nm-applet stopped showing in my notification area.
If I switch back to the network connection when I log on to my user the nm-applet works just fine.
This means that if I choose to log onto a different network, I have no way to do so other than changing my /etc/network/interfaces file to the old one.

Don't know if this is connected to this issue but seems similar