Use the Convert To Native dialog box to convert listen definitions to the Native type.
You will find a description of what is a Listen here.
The listen definitions listed are those that have been detected in an error state.
This can be caused by native services binding to these ports.
For example if you have Microsoft's IIS server running on port 80 then KFSensor will not be able to bind its Sim Server on that port.
There are two choices on how to deal with this:
This dialog automates the process of converting the selected listen definitions to the Native type.