[Help] Can ping, but DS says "No Robot Communication" only W7, ok from XP

[fovea1959]

bringing a new mule cRIO board online. Got the cRIO imaged, have had several weeks of successful use from my XP laptop.

Trying to bring my wife's laptop (Windows 7 Home) online. I disabled Windows firewall, shut down the wireless, connected the ethernet on the laptop to the cRIO with a crossover cable, configured the Ethernet to static 10.te.am.5 with a 255.0.0.0 netmask. I can ping (and FTP) 10.te.am.2 just fine, and the lights on the cRIO ethernet port indicate that packets are merrily going back and forth.

I bring up the DS, and it still says "No Robot Communcation". The Diagnostics Pane shows green for both the Enet Link and the Robot however.

What am I missing? I believe the Enet Link and Robot are green if things are pingable, where the "Communications" light is driven if the DS is receiving packets; this differennce is what made me double check the firewall settings.

I am stumped. Again, the XP laptop is fine, and I can ping and FTP the cRIO from the Windows 7, just can't get a green Communication Light from the DS.