Problem with PowerOff() and PowerState

Hi,

I am using VMware VIX 1.11.0.18997 with VMware Server.

Sometimes when I try to stop machine by calling method VMWareVirtualMachine.PowerOff() it throw an exception "Timeout has expired" (but at WMvare Server machine really stops) and then machine property 'PowerState' may be 8 or 1032 ('IsRunning' property is true) that is VIX says me that machine is running and I cannot start machine again by calling PowerOn() (method is executed but the machine does not start).

How could I solve this problem? And what does 8 and 1032 power states mean?

In general all is okey, this exception is thrown in 5..10 percents of all PowerOff() calls, but it is vary unpleasant.