blue screen vista beta 2 installation 64 bit version

Blue screen on Vista Beta 2 Installation (64 bit version)

OK... I have no clue of what is hapenning. Here it is:
My HDD is split in two partitions:
I have Win XP SP2 32 bits installed on first partition
The second partition is NTFS formated and I am TRYING to install Vista Beta 2 64 bits. I boot my PC using the DVD, it starts loading all files, and then that black copyright screen appears. It is still loading drivers...
Then I get a BSOD (blue screen of death) saying:
STOP: c000021a FATAL SYSTEM ERROR The initial session or system process ..... 0x00000000 (0xc0000221 0x001003x0) Your computer is shut down.
Something like that... WHAT ERROR IS THIS??? What is the problem? Please, someone help me!
Thanks in advance!
Daniel

Windows Vista

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