LILO Doesnt find /root FS.

[Edvinauskas]

I installed backtrack 3 onto my USB flash drive. every thing installs fine. When i try to run the command, lilo -v, it says that linux was added fine but it gives me one warning at the end. Have no idea why. After rebooting my pc and booting to the flash drive i get the red boot screen and start booting. But when it starts to boot, i get the message that lilo doesnt find the /root FS. But the problem is that root is /dev/sda3, and lilo config is set to root = /dev/sda3.
So why the heck doesnt LILO find the /root FS?

I forgot to add that the lilo file is default exept i changed the root from root=/dev/sda to root=/dev/sda3. So i dont think that the boot loader is mis-configured, but i might be wrong.

[Edvinauskas]

***BUMP***
Can Anyone help with this. maybe grub can do it?
Can any one help me with grub installation maybe?

[rcgreen]

but it gives me one warning at the end

What did it say?

[Edvinauskas]

Heres what the lilo -v command throughs out...

Reading boot sector from /dev/sda
Warning: /dev/sda is not on the first disk
Using Menu secondary loader
Calling map_insert_data

Boot image: /boot/vmlinuz
Added Linux*

Writing boot sector
/boot/boot.0800 exists - no boot sector backup copy made
One warning was issued

Thats what i throughs out im pretty sure it added BT3 as stated above. And heres what i get when i try to boot into the USB drive...

VFS: Cannot open root device "803" or unknown-block (8,3)
Please append a correct "root=" boot option
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(8,3)

Thanks for the reply. Hope this helps a little.