upgrading dapper to edgy

also when i run tis commands using alt + F2 a window showing "GNOME PANEL HAS QUIT " is displayed

Thanks for your question, try to do:

$: sudo -s

$: update-manager-c

let me know, thanks

thanks for ur reply . i tried it . tis time i got these set of replies
(update-manager:8568) Gdk -Warning * locale not supported by Xlib
(update-manager:8568) Gdk -Warning * cannot set locale modifiers
trace back(most recent call last):
 file "/usr/bin/update-manager" , line 28 ,in?
 import gtk
File "/usr/lib/python 2.4/site-packages/gtk-2.0/gtk/_init__.py" , line 45 ,in ?
 from _gtk import *
Run time error : could not open display

try this (apt-get mode) all in shell

Using apt-get

Edit your /etc/apt/sources.list as root. Change every occurrence of dapper to edgy.

Use any prefered editor. If you have a CD-ROM line in your file, then remove it.

sudo vi /etc/apt/sources.list

or

use the following Simple command

sudo sed -e ’s/\sdapper/ edgy/g’ -i /etc/apt/sources.list

Now you need to update the source list using the following command

sudo apt-get update

Upgrade using the following command

sudo apt-get dist-upgrade

Double check your process was finished properly using the following commd

sudo apt-get -f install

sudo dpkg –configure -a

Now you need to Reboot your machine to take your new ubuntu 6.10 installation to effect all changes.

Thanks

The right command is:
gksu "update-manager -c"
don't remove the quotes.

or check this page: https://help.ubuntu.com/community/EdgyUpgrades

thanks massimo . I tried it and it worked . at the end of installation I had the following message
Errors were encountered while processing
   iiimf-htt-server
   iiimf-htt-le-indic
E:sub-process /usr/bin/dpkg returned an error code (1)
anyway I rebooted after tat . My Xsession is ok . But has some problems with the page scrolling . Its not faster . Even the mouse cursor disappears when a page is scrolled .

Thanks Massimo Forti, that solved my question.