a2000 ubuntu booting problem

U-Boot SPL 2011.09-00000-g8d13bc8 (Aug 03 2012 - 04:00:41)
MMC:   SUNXI SD/MMC: 0
Loading U-Boot...   OK!
Jumping to U-Boot...


U-Boot 2011.09-00000-g8d13bc8 (Aug 03 2012 - 04:00:41) Allwinner Technology

CPU:   SUNXI Family
Board: A10-EVB
DRAM:  512 MiB
MMC:   SUNXI SD/MMC: 0
*** Warning - bad CRC, using default environment

In:    serial
Out:   serial
Err:   serial
Hit any key to stop autoboot:  0
reading boot.scr

835 bytes read
## Executing script at 44000000
reading script.bin

42144 bytes read
reading uImage

3969832 bytes read
reading uInitrd

** Unable to read "uInitrd" from mmc 0:1 **
## Booting kernel from Legacy Image at 48000000 ...
   Image Name:   Linux-3.0.38+
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    3969768 Bytes = 3.8 MiB
   Load Address: 40008000
   Entry Point:  40008000
   Verifying Checksum ... OK
   Loading Kernel Image ... OK
OK

Starting kernel ...