See this one ?

We are setting up a peer to peer net work with 1X Win Me 2 X Win 98 and 1 XP. The ME and 98 boxes can see and commincate with each other great but the XP box neither sees the others or is seen by them. It’s connected to the hub fine all lights are on but no commincation between the other boxes and the XP box. Anyone have an idea what it might be ?