Can't get my xfs partition to mount

["GIFFORD, ALAN (JSC-SF1) (JEC)" <alan.gifford1@xxxxxxxxxxxx>]

I have an externel SCSI hard drive that I'd like to mount under Linux.  I'm
using kernel 2.4.19, and I have

        File systems --> Partition types --> SGI partition support

compiled into the kernel, yet when I try to mount like this:

        mount -t xfs /dev/sdb1 /mnt/sdb/

mount returns that xfs is not supported by the kernel.  Unless the kernel
make screwed up, this has got to be wrong, because all the other stuff I
compiled into the kernel works.  It's not even an option to compile it as a
module, so that can't be the problem.

I did an fdisk /dev/sdb and looked at the partition table.  It has three
partitions listed, everything looks fine, it has an SGI xfs, SGI volhdr and
SGI volume partitions listed.  This drive worked on the O2 I just took it
off of, so I don't see what the problem is.

Thanks in advance for any help you can afford.

Alan