2003 NLB IP conflict on virtual cluster

i have two 2003 with windows NLB, some idiot tech loaded a workstation with an ip that was setup as the two server's main virtual ip address. both serversd went down.
i had to bring one of them back by re-entering IP info into the secondary nic.
problem i have:
1. the main nic isnt able to ping / be pinged (on BOTH servers)
2. neither server can be pinged by its dns name (only IP works)

both are connected to an HP 4000M switch i reseted the switch, i have 2 DNS servers (primary and secondary) - i have rebooted the primary, i have rebooted both servers.

i can seem to be able to ping the machine names even now that its on the secondary nic which is pingable.

is this a domain server issue?

I don't know if you found an answer for this or not, but we just had the same problem. Our routing issues turned out to be the ARP cache on the router. When the new device logged onto the network, the ARP cache started routing all data for that subnet to the now non-existant device. Once the ARP cache was cleared on the interface we could ping and connect to the virtual IP's again.