Cubietruck Problem with booting

[CarstenFeuls]

Hello

I have the Problem that my Cubietruck does not boot after uboot Upgrade.
All Updates are Installed.
This is my serial output from uboot.
-------------------------------------------------------------------
-Boot SPL 2014.04 (Oct 04 2014 - 12:34:11)
Board: Cubietruck
DRAM: 2048 MiB
CPU: 960000000Hz, AXI/AHB/APB: 3/2/2
spl: not an uImage at 1600


U-Boot 2014.04 (Oct 04 2014 - 12:34:11) Arch Linux ARM

CPU: Allwinner A20 (SUN7I)
Board: Cubietruck
I2C: ready
DRAM: 2 GiB
MMC: SUNXI SD/MMC: 0
*** Warning - bad CRC, using default environment

In: serial
Out: serial
Err: serial
Net: dwmac.1c50000
Hit any key to stop autoboot: 0
## Error inserting "stdout" variable, errno=22

## Checking Image at 41000000 ...
Unknown image format!
mmc0 is current device
SD/MMC found on device 0
** File not found /boot/uEnv.txt **
Checking if uenvcmd is set ...
Running default loaduimage ...
** File not found /boot/uImage **
Running default loadzimage ...
** File not found /boot/zImage **
sun7i#

---------------------------------------------------------------
But with this Kernel I can boot.
wget http://dl.cubieboard.org/software/a20-c ... 131102.bin

What I have done wrong?

My /boot is on the MicroSD the first Partition.
The / is on the Harddrive.

[PLyttle]

Most likely your uEnv.txt was deleted (** File not found /boot/uEnv.txt **)
Your root resides on harddrive, I guess /dev/sda1 (SATA) which needs to be set in uEnv.txt

my uEnv.txt reads "nand_root=/dev/sda1" but I use a very old uboot (I boot from /dev/nanda)
check your documentation for the correct command.

LP