Hi
Likely need to install the latest drivers for Windows vista 32bit from Realtek themselves for your model network card as the ones from ASUS are likely to be too old for that version mobo.
Sadly at this point when checking Realteks download page is broken, so when its working again grab the driver from here (just need to loacate your model which is Realtek 8101/8168/8169 ) and ...



