It says unknown option. I didn't have time to finish and clean it up yet. This is due to the fact that this is my last year of electronic engineering and that I'm up to my neck in project work. It says unknown option.
Problem now is that it is too automatic.
If you are sure you have it, well it probably isn't in the right directories, maybe use some symbolic links. Per defenition, this protocol will only carry packets that contain information for the connected computer. Don't put any path in front of the devices. Well in case Sniffit doesn't find the correct name itself, you will have to find it, and use the '-F' parameter. The devices can be found by using the 'ifconfig' or 'route' commands.