zachman1094 0 Light Poster

I recently downloaded Network Magic free for a 7 day trial. I installed the program, connected to my wireless network, and viewed my Map, which lets me see all of the devices on my network, and their IP Address. I was looking at the Map, saw my computer and my wireless printer, but not my other computer. My other computer came up as a Network Device, so I changed the name and icon to a laptop, and I still can't change it's internet connection, or take snapshots of my screen. My other computer doesn't have Network Magic on it, is that a problem? shouldn't I still be able to take screenshots and decide it's internet connection?
I'm sure this "network device" is really my other computer, I compared IP Addresses.
Any help will be greatly appreciated!