I am trying to connect a WINNT, dual processor 450mhz, to a WIN98, single processor 233mhz, with a crossover cable (cc) and pinging is unsuccessful. Hooked it up to a 10/100 hub and it works, complete with full copying of files and even can hook up to the internet. So it seems the computers and cards are OK. Tried one store bought cc and one home built cable, rebooted several times ? same result. When I connect the cc, the mouse will freeze. IRQ is 15 on both sides. Give me your wildest ideas. They usually work.