error message after kernel upgrade

[steve downes <steve@kingswayelec.co.uk>]

In the process of setting up a new machine I've upraded the kernel
from 2.2 to 2.4.22-1-686 using apt-get upgrade

I am getting:-
----
VFS Cannot open root device "303" or 03:03
Please append a correct "root=" boot option
Kernel panic: VFS: Unable to mount root fs on 03:03
----

I can boot from a floppy using root=/dev/hda3 & this is the option in
lilo.conf (& yes I have run lilo)

Cannot find any ref to "303" or 03:03 in the docs.

Any pointers please.

Steve