I think I'm having the same problem: the cap files are not deleted when I click "Delete Cap". I tried with my router, whose ESSID contains spaces, if it can be useful. EDIT: replay*.cap files can be deleted. So, maybe the problem is in spaces. (???) Then, I have a question: I tried with ARP Request Attack and I got no packets, then I tried with Interactive Inijection, used the first packet proposed and got a lot of packets! So, Interactive Inijection is "better"? I made many attempts with several routers, and ARP Request Attack sometimes worked and others not. What still I can't understand is if this attack works if no client is connected, or a client is connected, but there's no activity (the client is "idle") I can swear it worked with my router with a client connected and no activity (the router with which I'm trying is not connected to the Internet, so, to generate data, I have to "surf" in the router control panel ) But I've just tried again, in the same situation (one client connected and no activity), and no success.