Trying MMC boot with LAB

Hello
I am trying to boot the image from 
http://familiar.handhelds.org/snapshots/v0.8.3/RC2/unsorted/gpe-image-v0.8.3-h2200.rootfs.tar.bz2

I have installed LAB as per the instructions at 
http://www.handhelds.org/moin/moin.cgi/HpIpaqH2200LAB

When i installed LAB i got the CRC fail on the device but i also got 
WRITE fail. Is this normal? I have restarted the device and i can see 
the graphical LAB.

MMC formated as ext2, single partition and mounted under /mnt/mmc

Then i bunziped the rootfs and extracted with 'tar xvf 
gpe-rootfs-bla-bla.tar -C /mnt/mmc'

I created a labrun file under /mnt/mmc/boot/ and added the following 
contents:

copy fs:/mnt/boot/zImage fs:/zImage 
umount /mnt
armboot fs:/zImage "root=/dev/mmcblk0p1"

saved, synced and unmounted the mmc card. Put it into the device and 
rebooted. LAB appears to run (graphical invent freely logo etc), then 
the screen becomes black and stays there forever.

I am doing something wrong. Could someone please give me some advice?

Thank you
Andreas