You must ethernet controller driver first
goto device manager, right click at exclamation mark, then chose update driver, follow instuction step by step, if it ask for cd driver insert motherboard cd driver, if you did not have cd driver download ethernet controller here
http://www.asrock.com/MB/download.asp?Model=P4i65GV&o=XP
wait until process finish and exclamation mark at device manager disappear, and try to connect your computer to internet
i hope this helpful
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