Install boot on floppy

Hello

I've got some problems with installing a Seawolf distro on an old 
pentium 133 machine with 64 Mo RAM (EDO), that cannot boot on cdrom.
So I made a boot floppy from the boot image in the images folder on CD1 
(I also made a driver disk with drivers.img)

When I boot, I get the boot prompt. So I enter the text mode. The system 
starts loading initrd.img, and then vmlinuz. But it fails with this error:

    Boot failed: please change disks and press a key to continue.

I've tried with linux dd mode, nofb mode, expert mode, but all fail with 
the same error.
I can't figure out what I am doing wrong

I've tried to boot a Knoppix distro on cdrom, with a boot floppy, and 
this one works fine.
If Knoppix can be loaded, Seawolf can be installed, isn't it ??

Thanks

k.