Installed Vista 32 bit ober the 64 bit and Network Card stopped working

Hi, I installed the Vista 32 bit over the 64 bit version, and my realtek network card appears with a yellow triangle mark in the controllers view.
I have already went to the Realtek Website and downloaded the controller updated version but it remains with error and not giving me access to the internet. How can i solve this problem?

You have to do a clean install to go from 64 to 32-bit OS. Did you do this? What is the computer make and model? What is the realtek model?

I made a clean install, or I think I did it, because the other option was greyed out.
The Network Card is a Realtek RTL8168/8111 Family PCI-E Gigabit Ethernet NIC (NDIS 6.0).
The Computer is a Intel 2 Quad CPU Q6600 2.4Ghz 4Gb Ram

Do you think it might be related to the fact that when I installed it, it did'nt had the internet connection needed to use important windows updates?