New Vista machine

Hello well we are trying to setup our first Vista Machine on our network
server is Server 2003 No Domain its just setup as a Workgroup, the Vista machine obtains an IP from the Router and can access the internet BUT it cant see any of the other machines in the workgroup when I start the network assistant it says it will now search for network components and nothing ever happens, I can ping other machines from it and can ping it from other machines its just not showing up in the workgroup, firewall is turned off
any suggestions would be appreciated
David