mount SD card problem

Hi

I want to mount SD card to /mnt

I follow the altera wiki http://www.alterawiki.com/wiki/mmcsd

But I can't mount successfully

When I boot kernel the information is

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uClinux/Nios II

Altera Nios II support (C) 2004 Microtronix Datacom Ltd.

Built 1 zonelists. Total pages: 2032

Kernel command line:

PID hash table entries: 32 (order: 5, 128 bytes)

spi_read read data time out

spi_read read data time out

spi_read read data time out

spi_read read data time out

spi_read read data time out

Dentry cache hash table entries: 1024 (order: 0, 4096 bytes)

Inode-cache hash table entries: 1024 (order: 0, 4096 bytes)

Memory available: 5692k/8192k RAM, 0k/0k ROM (1695k kernel code, 715k data)

Mount-cache hash table entries: 512

NET: Registered protocol family 16

NET: Registered protocol family 2

IP route cache hash table entries: 1024 (order: 0, 4096 bytes)

TCP established hash table entries: 1024 (order: 0, 4096 bytes)

TCP bind hash table entries: 1024 (order: 0, 4096 bytes)

TCP: Hash tables configured (established 1024 bind 1024)

TCP reno registered

SPI: Nios SPI bus device version 0.1

io scheduler noop registered

io scheduler deadline registered (default)

Serial: JTAG UART driver $Revision: 1.3 $

ttyJ0 at MMIO 0x838010b0 (irq = 0) is a jtag_uart

YOU have init Device 254

JELLO EXMAPLE INIT

TCP cubic registered

NET: Registered protocol family 1

NET: Registered protocol family 17

Freeing unused kernel memory: 588k freed (0x29b8000 - 0x2a4a000)

Shell invoked to run file: /etc/rc

Command: hostname uClinux

Command: mount -t proc proc /proc

Command: mount -t sysfs sysfs /sys

Command: mount -t usbfs none /proc/bus/usb

mount: Mounting none on /proc/bus/usb failed: No such file or directory

Command: mkdir /var/tmp

Command: mkdir /var/log

Command: mkdir /var/run

Command: mkdir /var/lock

Command: mkdir /var/empty

Command: ifconfig lo 127.0.0.1

Command: route add -net 127.0.0.0 netmask 255.0.0.0 lo

Command: cat /etc/motd

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And I can't find the mmcblk0 at /dev

How counld I solve it??

Please help me

Thank you very much