can't boot due to root device problem

[Bob Berman]

I installed a new SCSI hard disk in my system and installed
SuSe 7.2 on it. I am trying to use GRUB to boot this system
but it is not working and I can not understand why not. 

I have a SCSI disk - id 0 - sda - already in the box that has
Linux on it. I have installed LILO in the MBR and this boots
fine.

My new SCSI disk is id 1 - sdb - and this is the partitioning:
/dev/sdb1 - /boot (ext2fs)
/dev/sdb2 - swap
/dev/sdb3 - / (ext2fs)
/dev/sdb4 - LVM partition (/opt /home /var)

I try to boot it with the
following commands:

root (hd1,0)
kernel /boot/vmlinuz root=/dev/sdb3
boot

When I boot Linux, the error I get is:

request_module[block major-8]: root fs not mounted
VFS: Cannot open root device "sbd3" or 08:13
Please append a correct "root=" boot option
Kernel panic: VFS: Unable to mount root fs on 08:13

I am absolutely sure that my root partition is /dev/sdb3.
What is going on and how can I get it to work?
I am using grub 0.90, by the way.

Thanks!