unable to scan after upgrade to 7 from 6

unable to scan after upgrade to 7 from 6

just upgraded to :Version : 7.0.0
Build Number : 7012
now whenever attempting to scan a new workstation it comes back with a completlely different workstation. ie: "New Scan" choose PC228 it comes back with PC104. Our DHCP server is set to scavange records after 7 days, I tried manually removing all dhcp records and dns records for the workstations but same prob.
we do not use netbios over tcp/ip

pleadse help this is a showstopper for us.




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