TiVo Desktop Plus cannot see TiVos

Hi,
System info. New Mac Pro, Running Win 7 64 bit (on Mac via Parallels) ... new installation of TiVo Desktop. I have a Series 3 HD and a Premiere.

I've double checked the MAK I entered.
The firewall on the PC is clearly opened for all the TiVo programs.
I've tried both Bonjour and TiVo Beacon.
I have successfully loaded the welcome page of both TiVos using their respective IP addresses from the browser running on the same Win 7 environment.
I've shutdown/started the Win 7 environment multiple times.

But when I try to "Pick Recordings to Transfer" from the tivo desktop software ... it fails to find any DVRs on my home network.

Any suggestions?

Thanks,

Steve