Help, Network adaptor installation problem ?

Hello,

I have a Dell Dimension E512 PC.

Today, I used my windows XP disc comes with Dell to re-format and install Windows XP. Everything turned out fine as usual except Windows could not detect my Network Adapters.

If I go from: Start --> myComputer (right click) -> property -> hardware -> Device Manager, I found some "yellow question mark" under Other devices; But I could not find the network adapter.

Anybody has any clue what is the problem for this ?

Thanks a lot