HELP - Canot find router in NetInstall

I followed the manual to setup netinstall.

After the router boot, from the serial console, I can see the router can get the IP from the bootnet option in netinstall.

Can resolve the mac addreess of the LAN card of my PC
(win7 64bit, firewall and anti-virus disabled) and run Netinstall using admin right.

But after that the console generated several lines of ******************* and the router cannot be found in NetInstall.

I tried several board, RB113, RB433AH and CrossRoad.
Same result.

Anyne can help?

Any idea?