!!!checksum problem of network boot image for linux!!!

Hello,

I try to build a diskless client based on Open SuSE 10.3 with kernel  
2.6.31 for
CPCI-boards. The kernel is prepared and works fine on one CPCI-board with
harddisk. So I used the following mkelf-linux command to build the  
network boot
image for linux with format ELF:

"mkelf-linux --output=vmlinuz.etherboot.pilas5 --rootmode=rw --ip=dhcp  
vmlinuz-2.6.31"

After copying the image to the tftp-server and booting the CPCI-board  
I got the
following output on screen:

ROM segment 0xcd00 length 0x8000 reloc 0x00020000
Etherboot 5.1.6 (GPL) Tagged ELF for [E1000]
Probing pci nic...
[E1000]Ethernet addr: 00:80:8252:0A:E6
Searching for server (DHCP)...
Me: 192.9.200.155, Server: 192.9.200.137, Relay: 192.9.200.129,  
Gateway 192.9.200.129
Loading 192.9.200.137:vmlinuz.etherboot.pilas5 (ELF)... \
Image checksum: ad96 != computed cecksum: 55e0
<abort>

I looked for this error at google but I found no comments solving this  
problem.
What is the problem? At first I thought that the prepared kernel and initrd is
too large and I reduced both. But still with the same result. The next thing I
tried was to use no initrd, but still the same result.

I did the same things with the same hardware and SuSE Linux 9.0 with kernel
2.4.32 years before succesfully. So I think the way must be right, mustn't it?

Please help me! I spent such a lot of time now without any result.  
Where is the
mistake?

Thank you very much!
Best regards,
Torsten B.


My hardware is:

cPCI-board Kontron CP6000

11: PCI 20d.0: 0200 Ethernet controller
   [Created at pci.301]
   UDI: /org/freedesktop/Hal/devices/pci_8086_1079
   Unique ID: rBUF.VG+flap3kH5
   Parent ID: z8Q3.lk+WaVwzUaA
   SysFS ID: /devices/pci0000:00/0000:00:1c.0/0000:02:0d.0
   SysFS BusID: 0000:02:0d.0
   Hardware Class: network
   Model: "Intel 82546GB Gigabit Ethernet Controller"
   Vendor: pci 0x8086 "Intel Corporation"
   Device: pci 0x1079 "82546GB Gigabit Ethernet Controller"
   SubVendor: pci 0x8086 "Intel Corporation"
   SubDevice: pci 0x1011
   Revision: 0x03
   Driver: "e1000"
   Driver Modules: "e1000"
   Device File: eth0
   Memory Range: 0xfe880000-0xfe89ffff (rw,non-prefetchable)
   I/O Ports: 0xc480-0xc4bf (rw)
   IRQ: 9 (29139437 events)
   HW Address: 00:80:82:52:06:de
   Link detected: yes
   Module Alias: "pci:v00008086d00001079sv00008086sd00001011bc02sc00i00"
   Driver Info #0:
     Driver Status: e1000 is active
     Driver Activation Cmd: "modprobe e1000"
   Config Status: cfg=no, avail=yes, need=no, active=unknown
   Attached to: #22 (PCI bridge)



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