Network adapter issue in Vista Ultimate(guest)

[sai]

Hi all,
I have installed virtualbox 4.0 on Mac OS Snow Leopard and installation went fine. However, I am unable to connect to the internet as it does not recognize network adapter. I tried to change the setting in 'Network Adapters' on Virtualbox but none worked. Can someone also experienced this issue? It's asking for the network adapter drivers..and I am stuck. My adapter is PCnew-FastIII(AM79c973). This shows up in the adapters list on virtualbox but vista is not recognizing it. Any help is greatly appreciated.

Sai

[Perryg]

You need to use the IntelPRO 1000 MT adapter in Vista as stated in your VirtualBox users manual.

[sai]

Thanks PerryG, but I cannot select my adapter in 'Network adapter' tab. Its grey button and the default selected adapter is PCnet as mentioned in my previous post. Also, I tried to follow the section of manually extracting driver software for AMD card but unable to do so.

[Perryg]

The guest MUST be shut down before you can change these settings.