I have googled and searched the forum but cant figure this one out
I build my own custom kernel using the source code from
to have webcam support built in.

I made a whole new lzm system, copied to my BT4 usb stick (BT4/base).
Copied the new vmlinuz-custom to /boot/vmlinuz-custom to usb stick
Added a new line in /boot/syslinux/syslinux.cfg :

MENU LABEL BT4 Beta Custom
KERNEL /boot/vmlinuz-custom
APPEND vga=0x317 initrd=/boot/initrd.gz ramdisk_size=6666 root=/dev/ram0 rw quiet

But Im getting the following error at boot time:

setup union directory (using aufs)
mount: mounting aufs on union failed: no such device
UDF-fs: no partition found (1)
Fatal error occured - can't setup union (aufs)
Something went wrong and we can't continue. This should never happen.
Please reboot your computer with ctrl+alt+delete ...

Ive also tried to make an ISO file to boot in vmware or even into a DVD, but im geting the same error.

Can anyone help me on this.