First off, I dont know a great deal about networks, so bear with me . Anywho, a day nor two ago a problem started with the network here at my dads office. All the computers (there are 6 in total I think) are networked together (using hubs and whatnot) to the server computer, which connects to the internet with a 128k ISDN line. So with this, all the computers can browse the internet at the same time, and access shared files from each other. Anywho, a few days ago all but one of the computers lost being able to connect to the internet (yet they could acess the shared network files fine). The one computer that still can access the internet cannot access the shared network files. Anyways, origionally I thought it might be a hub problem, but we tried switching the hub port that the computer that could connect to the internet on, but it didnt make a difference (it was still the only one that could connect), so I _think_ that rules out the possibility of a faulty hub. So anyways, my current thought is that since this its through an ISDN line it must be using "Internet Connection Sharing" (I didnt set the network up or anything, so I dont know). If it is, then im guessing that it could be a problem with that, although im not sure. If thats possible would there be a way to check the status of the ICS? If that probably isnt the problem, then does anyone know what could be wrong? Thanks for any help!

Oh yeah, the host computer is a "WinNT Server" if it matters.