hi I have a wireless network in my house between my PC and My Ibook. pc is directly connected to the wireless router and ibook is connected wirelessly to the router... but my sister came over today and she was able to get connection to my router just by turning her computer on.. well i do not want this... i want to be able for only my ibook and Pc to be able to connect through a password you must type... and if anyone else wants to come into the network they must also put in my password.. so how do i do this.. thanks _ John