I had/am having the sam problem, and here is what I know. P2P communication needs to be turned on under Windows components, I also turned on the messaging service, but not sure if that matters. Second The chat tools use IPv6 as the communications
protocal so you have to make sure that is installed in your network setting (Vista and Win 7 should have thes on by default) but I would check to be sure. Third if the routers on the network that you are on do not have IPv6 enabled (most older ons don't)
you will not be able to communicate between computers on the same network.
I have used these tools on all 3 operating systems (XP, Vista & Win 7) and as for working on my computer it works just fine, however until they update the routers in my classroom I will not be able to test across computers. Keep your fingers crossed...
Lastly. Some one asked about a listing of who is currently connected. It is possible unfortunitly you have to do all the coding yourself. I have completed this in my application by sending a specific message across the thread, that if a
connected users application see it it send back a specific message with the users name and adds/ or delets its from a listbox (adds if they log in, delets if they log out)
Hope that helps..... If anyone can tell me where to find the source code for the C4F DLL's I would love that. I would like to check them out, and if possible change some stuff that they do that I don't like.