ok i have a big problem with my networking .. im new to this whole networking thing though so please forgive me if i sound newbie. my network was working perfectly before though so i know im using the right cables and everything but heres the problem: recently my little brother got a new comp and i formatted my drive so we both used a formatted harddrive and installed win xp pro. we use verizon DSL for an internet connection and a 3com hub(which is extremely old) well .. i tried to set up the network using the xp wizard thing on both comps. we can file share and both go online. but heres the thing.. we get disconnected from the internet when he tries to play a file from my comp and vice versa. and when we're both online at the same time we would get disconnected a lot more than usual. but everything ran smoothly before we formatted the drives because we had a professional help us set up the network. our collision light blinks a lot too when we're both connected. maybe i didnt set up the network right or my hub is dying and should get a new one? for the xp networking wizard i clicked these in the following order: "set up a home or small office network" "This computer connects to the internet through a residential gateway or through another computer on the network" then i typed in my comp name and workgroup name "turn on file and printer sharing" im not too sure about the problem so please help. and feel free to ask for more details if needed .. i really wanna get my comps networked properly.