You don't have enough information there for us to be much help ... We need to know the model of the card. Is it an "ethernet" card, or a "wireless lan" card. There is a difference, you know.
The best advice is probably to start over with the installation installing Lenny instead of Etch. Etch is so old it aches at every joint. People "in the know" have long since switched to Lenny.
Certainly it handles lots more hardware than Etch, but I'm pretty sure your card could be made to work on Etch as well. Not worth the effort in my opinion, though.