In order to tell Big-B which TV to control, navigate to:
Settings
Network Settings
On the right hand side of the screen in TE4, you will find your IP address. Enter that in the settings screen under "Configuration" where it indicates the IP address of your TiVO.
TiVO requires "Network Remote Control" to be enabled in order to remotely control your TiVO.
On TE4 Navigate to:
Settings
Remote & Devices
Network Remote Control
Set "Network Remote Control" to ALLOWED
Once enabled, navigate to Live TV and try hitting the SKIP button. You should hear the TiVO make a low bass sound that typically indicates you can't skip any further ahead.