How can I network a Windows XP and a Windows Vista computer?

[jennifer]

Hi

I have a Windows networking problem. My two desktop PCs - one running Windows XP Professional Edition and the other Windows Vista Business Edition - are connected to an ADSL router. Both PCs are connected to the web. However, for some reason, they can't see each other. The workgroup, default gateway, and subnet mask are the same for both PCs - as they should be - and each PC has a unique computer name. The network used to work when both PCs were using Windows XP Pro.

Thanks