thank you for your fast reply,

but p5 is the ubuntu partition.

when i boot nitdroid there is displayed a kernel version but in nitubuntu bootscreen after pressing 3 for ubuntu are only the options i filled in:

ITEM_NAME="Ubuntu 9.10 Karmic (external SD, partition 5)"
ITEM_ID="ubuntu"
ITEM_DEVICE="${EXT_CARD}p5"
ITEM_MODULES="mbcache jbd ext3"
ITEM_FSTYPE="ext3"
ITEM_FSOPTIONS="noatime,rw"

isnt it necessary to have an ITEM_KERNEL=xxx or other options
to boot nitubuntu ?