You need to perhaps check that you have the correct driver installed. Look on the packaging of the F5D7000 and see which version you have. It`s also printed on the adapter itself. Drivers available click here
Can`t see that the age of the machine has anything to do with it. If it`s running XP already this simple request won`t stretch it! Check in IE Tools>Internet Options> Connection Tab that "Never Dial a connection" is selected.