I want to connect two computers at my home. Work group is same on both computers. Oprerating system is XP on eone computer & Win98SE on another computer. I had directly connected this two computers thru Lan card. but on XP PC it is showing error "Network Unplugged". I also tried cross cable, then also message remain same. But after connecting thru HUB two computers are connected. Is it neccessary to connect network using HUB?