You'll need to modify web30ajaxcomp in the stored procedures. Where it says :
UNION
SELECT DISTINCT IdentifyingNumber AS Computer, 'icons/assettag.gif' AS ComputerImage
FROM dbo.tblComputerSystemProduct
WHERE (IdentifyingNumber <> '')) DERIVEDTBL
change it to :
UNION
SELECT DISTINCT IdentifyingNumber AS Computer, 'icons/assettag.gif' AS ComputerImage
FROM dbo.tblComputerSystemProduct
WHERE (IdentifyingNumber <> '')
UNION
SELECT DISTINCT IPAddress AS Computer, 'icons/assettag.gif' AS ComputerImage
FROM dbo.tblNetwork
WHERE (IPAddress <> '')) DERIVEDTBL
After that, restart the WWW Publishing service.