enable to remove ethernet card driver

hi friends
i am runing windows 2000 server with realtech 8139 ethernet card.now i have remove that card and now i have placed L.G card .but now also it is detecting the old card thatis realtech 8139 and different services error is coming like smtp.ftp,nnpt etc.but internet and network connectivity is proper.why these service errror is coming.waiting for ur reply.