[CentOS] using kvm

Tue Jan 4 19:01:08 UTC 2011
Jerry Geis <geisj at pagestation.com>

All -  I am running a virtual windows 7 (pro 64) on centos 5.5 x86_64.
I was hoping to run virtual XP inside windows7 in this configuration.

I get an error about cannot start virtual XP when I try this.
Do I not have something setup correctly or can I not run a "double" 
virtual environment?