WDK installation on Virtual PC

I can't install WDK on my Virtual PC with Windows XP. I have installed .net framework 1.1 and even microsoft sql server desktop engine. When I run setup wizard of wdk, it finishes without giving reason, only with text "Microsoft Windows Driver Kit 5112 Setup Wizard ended prematurely because of an error ".
I have installed WDK on my "real" system (win xp too) without any problems.
What could be that "error"?
[425 byte] By [gosai] at [2007-11-19 18:07:12]