DL 360 G4 “Windows 2008 STD/ENT 64X Installation Issue (dual processor)

[I-1]

Hi,

I am trying to install Windows 2008 STD/ENT 64X on my :

- HP ProLiant DL360 G4 Rack Server
- 2 x 3.0 GHz XEON
- 4GB RAM (4 x 1GB)
- 2 x 72GB SCSI (Raid 0+1)

But I get a blue screen that Windows cannot install with the error message:
"multiprocessor not supported"

The latest firmware is on this machine and the Processors are identical the same.
Processor 1 = 300 Ghz/800 Mhz (1MbyteL2)
Processor 2 = 300 Ghz/800 Mhz (1MbyteL2)

When I take the second processor out it will start the Windows 2008 STD/ENT 64X setup.

What am I doing wrong here?

Thanks in advance for your answer.
Iwan