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Your new installation lacks a driver for the network adapter. Go into Control Panel>System>Hardware>Device Manager and find that adapter in the list of yellow marked devices, right click it and go to Properties then click the Details tab the HardwareIDs.
Take a note of the four characters which follow VEN for Vendor and the four after DEV for Device and input them at http://www.pcidatabase.com and you should find your way to the right driver. Post those details back here if you still have any problems. Once you're back online, you can find the drivers for the other yellow marked devices.
TIP When reinstalling XP, it's always best to get the drivers out of te old system first - it makes life much easier.
Thanks Saga Lout have tried your suggestion it worked a treat am now back up and running
once again thans very much for your help