Viritual OS won't keep the clock in sync with host?

Question

Our computer for controlling all doorlocks in one of our main buildings shut down for good just the other day.
However the software for administration and control of this is so old that it won't run on anything newer than Win 98.
Problem beeing, that most modern computers are waay to "big" to run Win 98(too much memory, ect..)
Solution was simple thou, just get a clean install of Win XP with all of the necesarry drivers, and run Win 98 in a Viritual Environment.
This works all but great, except 1 thing: The clock of the guest OS(98) does not sync with the Host's clock(XP), and runs about 1 sec. slower per minute. That in total would make it 24 minutes slow after a day. Which indeed is a problem with time controlled
locks.
The clock on the host's OS is just fine, correct, and doesn't slow at all, but still the guest OS is not in sync.
Is there any way to force a clock sync from the guest OS to the host every now and then, say, every hour or so?
Keeping in mind that this system is offline, not connected to internet or any network at all?
Edit: The clock of the Two OS's are synched at startup of the guest OS, and it's from there the clock's fall out of sync..

Answer 1

You'd install the VM Additions or Tool for the Windows 98 guest which provide the interface for time sync.
You don't mention what virtualization solution you're using though.  
Windows 98 is not supported by Windows Virtual PC, if that's what you're using.  You may be able to get the older VPC2004 VM Additions to work with WVPC and allow for time sync.