I've read about how to use an imac as a software base station in books and from Google search results. They all say something like, "just turn on Internet Sharing, and presto! you save the money of a hardware base station!" Unfortunately, it doesn't seem to be that simple for me. Right now I am typing from an imac running 10.2.8 with a regular airport card. On my lap is a new ibook running 10.3.4 with an airport extreme card. On the imac I turned on internet sharing and the airport card. On the ibook, i then turned on the airport. The ibook autosenses the wireless network, aptly named 'imac'. I get 13 bars for my ibook's signal level in Internet Connect. However, I can't access files on the iMac, surf the internet through some shared connection, or even log onto iChat. It seems as if there is no connection between the two computers at all. Help! How can I get the imac to talk to the ibook?