I'm having the problem detailed here: http://kb.swsoft.com/article_133_671_en.html
This is on a server that has NO VPSes defined.
megara:~# vzlist -a
VPS not found
megara:~# uname -a
Linux megara.conceptualarc.com 2.6.8-022stab072-smp #2 SMP Fri Mar 31 04:59:41 EST 2006 i686 GNU/Linux
You'll notice that I'm in ~ (one of the things to check from that kb article)
megara:~# vzctl create 5001 --ostemplate=debian-3.1-i386-minimal
Creating VPS private area: /vz/private/5001
vzquota : (error) Quota destroy syscall for id 5001: Device or resource busy
vzquota setlimit -f failed [3]
Performing postcreate actions
vzquota : (error) Quota destroy syscall for id 5001: Device or resource busy
vzquota setlimit -f failed [3]
VPS private area was created
megara:~# vzctl start 5001
Starting VPS ...
vzquota : (warning) Quota is running for id 5001 already
VPS is mounted
VPS: 5001: started
Setting CPU units: 1000
VPS start in progress...
I also can't ping anything away from the hardware node, but that might be some different problem.