Why did not my Hurd boot?

[root]

Dear all:
      I installed Hurd on my partiton /dev/hda4 (8.5G big),but when i
booted it from grub 0.95,when had displayed these lines:
    "task loaded:/lib/ld.so.1 /hurd/exec
    start /hurd/ext2fs.static:ext2fs:device:hd0s4
    Hurd server bootstrap:ext2fs.static[device:hd0s4]exec"
it hung. 
    The content in the file /boot/grub/menu.lst about the Hurd  is :
"title          Debian GNU/Hurd
root            (hd0,3)
kernel          /boot/gnumach.gz root=device:hd0s4 -s
module          /hurd/ext2fs.static --multiboot-command-line=
${kernel-command-line} --host-priv-port=${host-port}
--device-master-port=${device-port} --exec-server-task=${exec-task} -T
typed ${root} $(task-create) $(task-resume)
module          /lib/ld.so.1 /hurd/exec $(exec-task=task-create)
boot"
    My cpu is CD 320 2.4G;GPU is Geforce FX5200;Hard disk is Seagate
160G(ATA,2M cache);memory are one HY 256 DDR 400 add one Kingmax 512 DDR
400;
    Who can tell me why?thanks very much.