Kernel -14 and -15 won't boot

[Blue Rose]

Hey all,

I run Kubuntu 8.04 with KDE3.. I got some updates recently, first kernel 
-14 then kernel -15, but neither of them will boot.. I get the Kubuntu 
logo with the blue loading bar.. nothing happens.. Alt+F2 shows me this

Starting up
Loading please wait
<few minutes go by>
Check root= bootarg cat /proc/cmdline
or missing modules, devices: cat /proc/modules ls /dev
ALERT! /dev/disk/by-uuid/9c60e178-a4eb-48d0-936e-26962c7f48e3 does not 
exist.
Dropping to a shell!

Busybox 1.1.3 (Debian 1:1.1.3-5ubuntu12) Built-in shell (ash)
Enter 'help' for a list of built-in commands

(initramfs)_

No clue what all this is, I'm fairly new to linux...
Rebooting (Ctrl Alt Del) and delecting the -12 kernel in the grub menu 
works fine.. Kubuntu loads and works right away..

Can anyone explain what's going on here? Error in the updates? Or is it 
something with my computer?

Cheers
Linda