XP SP3 dialup connection "connects", but can't ping anything beyond the modem itself. All other IP addresses (e.g. the ISP's DNS server) return "Reply from 126.96.36.199: Destination net unreachable." That address (188.8.131.52) is the ISP's "server IP". Since I can't get to this address IE can't get anywhere. This must be a simple configuration problem - but I've tried everything I can think of. Help please.