I'm assuming you're using Windows Internet Connection Sharing, which I have found to be workable, but buggy. If I were you I would download a trial version of some other ICS software (I have used Winroute [
www.kerio.com] before, it's stable, easy to setup, and there is a free trial version available) and see if that fixes your problem. If it does, then you know Windows ICS is the problem. If it doesn't, I'd try using a router, but then again you've got the half cable/half dial-up thing going, so that wouldn't work. I've never heard of a setup like that, BTW. I've heard of Satellite internet using dial-up for xfers, but never cable.