Hyper-V setup Problems

[Guest]

[pt1xoom]

Hello,

I am having a lot of trouble setting up EFW in my Hyper-v setup.  Here is the my setup.

Windows 2008 R2
Hyper-V legacy network cards
two NIC

I can get the firewall up and running.  When I log into the interface and set up the Red interface, the box re-boots, and I loose all network connections.  I am able to use the shell and re-configure the network, but nothing I do seems to work.  I thought maybe that the interfaces switched, but I switched the cables, and still nothing.

What am I missing.  I see a lot of people running this in Hyper-V.  I have been able to get this working in VirtualBox without a problem.

Thanks.