dist-upgrade to sarge

[Jianan]

Hi,   I was able to use the sarge cd #1 to do a dist-upgrade. I mounted the cd with   mount /dev/hdc -t iso9660 /mnt   Then I add a line to sources.list to read from /mnt   Then apt-get update followed by apt-get dist-upgrade   Everything seems to go smoothly. When I reboot, the KDE login screen appears. After login, screen-centered  window with a big 'debian' logo appears. At the bottom left was some icon, at the bottom middle was 'window manager'. No matter where I click the mouse within the window, the screen goes blank and stays blank.   I have to do a alt-ctrl-f1 to get back to command-line mode. I wanted to re-do a dist-upgrade. But when I try to mount the cd using the same command as above, it failed , saying the kernel does not support iso9660 filesystem!   I noticed that I am still booting up in 2.6.3 kernel eventhough sarge is supposed to use 2.6.8.   Any idea what has happened?     Jianan