mkbootdisk can't make bootable floppy disk

Hi List,

I can't use mkbootdisk to make a bootable floppy disk for my linux server. I would like to get some help from this list.

Here is the detail:
My linux server is running on a Compaq server box which has RAID hardware.
# ls /lib/modules
2.4.7-10  2.4.7-10smp fs
# mkbootdisk -v 2.4.7-10smp 
<ok>
# mount /dev/fd0 /mnt/floppy
# ls /mnt/floppy
boot.msg  initrd.img  ldlinux.sys  syslinux.cfg  vmlinuz

When I boot from the floppy disk, It prompt as below:
--
Press <return> (or wait 10 seconds) to boot your Red Hat Linux system from
/dev/cciss/c0d0p3. You may override the default linux kernel parameters by typing
"linux <params>", followed by <return> if you like.
--
After press <return>, The prompt is like below:
----------
Boot failed, Pls. change disk and press <return> key
----------

Here is the content of file syslinux.cfg on the boot disk:
---------
default linux
prompt 1
display boot.msg
timeout 100
label linux
        kernel vmlinuz
        append initrd=initrd.img root=/dev/cciss/c0d0p3
---------

I think this server has two big differences with the ordinary PC: RAID disks and Network adapter.

But I don't know why I failed to create a bootable disk. Can anyone here give me a hand ? 

Thanks in advance.

Regards
John Li