Macbook Pro air port or ethernet not working.

I one of the original macbook pro with the glossy screen, its not reading the Airport or ethernet port? what would be causing this? its not showing up in system preferences or anything. the only thing that shows up is firewhire and bluetooth. any suggestions?
ive already tried a new airport card and re installing the operating system? anything else?

Silly question maybe, but you are not able to manually add either of the interfaces either? You do this inside network settings by clicking the plus button in the lower left corner of the interface list.
Carl

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