Question : ttl expired in transit after vpn reconnection

An XP SP2 computer establishes a VPN connection to our network..
Our Mirosoft 2000 server can ping the computer by hostname...
If the computer disconnects then reconnects their VPN connection...
----- This causes the computer to get a new IP address...---
----- The VPN is on a rotating DHCP address.. this cannot be changed.. -----
The server then gets a TTL Expired in transit error when you try to ping the computer by hostname...
----- It is still looking for the computer at the old IP address.. -----

Disabling DNS Client service on server does not help.
Doing IPCONFIG /FLUSHDNS does not help..

The server has to be rebooted before it will start pinging the computer at the new address...

Answer : ttl expired in transit after vpn reconnection

Are you pinging by computername.domain.xxx
Or are you pinging by the WINS name: computername