Im using vista and it seems Route sentry doesn't work anymore whats wrong?
All you need to do for the Vista version. Download the Vista Routesentry Beta version.
Create a PPPoE dialup connection in Vista (I would suggest the local account). Go to the start menu, type ncpa.cpl, open it, then double click on the connection, go to properties and then TCP/IP V4 properties, remove the tick from "use default gateway".
Now, make sure the account is disconnected, you can see this in the notification area, where the two computers are connected, right click there and choose disconnect from >.
Open Routesentry and choose the Local and International accounts, click connect and check the log if it was successful and without errors, if you have any errors, it's not set up correctly.
This is said that I assume your router supports Half Bridge or PPPoE Relay and that it is selected.