1. assign fixed internal IP address to each computer.
2. forward the ports for each eMule client to the IP address of the computer on which it is running.
More detailed help is available at http://www.portforward.com
Note: this is a free site, but there are some advertising links that offer paid software.
after i update to 1.2d, i receive only a low id.
Were you getting HighID on both clients before
you upgraded to 1.2d? If so, then that is a different issue. Check that the ports forwarded in your router are the same ones that are being used by the respective clients. Also, delete the rules for emule.exe in your firewall on each computer and when the firewall asks you again, allow emule.exe to connect to the internet and accept connections from the internet.