I have looked around a bit so sorry if this is a common issue, but I can't seem to figure out how to get my XP setup in Xen to communicate over the network. It does however allow me to get to the VM over the network address. So the scenario is:

VM gets IP from gateway via DHCP which is working
Can Ping VM on it's IP address from another PC
Can get to file shares on VM
VM can not send out...gateway, another machine, internet, etc....

Is there something I am supposed to do to let the VM send out? Any thoughts?