I want install windows server 2003 ia64 edition via pxe.

Here is my step:

1.PXE boot the target machine from bootmgfw.efi(I got this file from windows server 2008_IA64 neta3).
---successful
2.Boot the target machine to winpe via PXE. (I got the boot.wim from windows server 2008-IA64 beta3)
----successful
3. Mapping installation media (windows server 2003 ia64 edition)
--- successful

4. run the command
winnt32.exe /syspart:c: /tempdrive:c: /s:z:\media\en_ws_2003_ent_ia64\ia64 /unattend:z:\uafiles\win2k3sp1.txt /noreboot

I got a "out of memory" error.

---failed

5. run the command winnt32.exe
I still got the "out of memory" error
---failed

6. I check me machine's memory and ramdisk

2GB memory, and much of them is free.
64M ramdisk, and free 63M


Anyone could help me?

many many thanks!!!!