I have a basic home network using a Linksys WRT54G router. My G5 Powermac is connected by ethernet, and I had an iBook wirelessly connected. All was OK and both comps could see each other. I've now replaced the iBook with a Macbook. I entered the new MacBook's MAC address into the Linksys setup page. The MacBook connected to the net OK and shows the Powermac in the finder Network, but for some reason the Powermac doesn't see the MacBook. I've done a bit of fiddling but can't think why things would change by simply replacing one laptop with another. Anyone any ideas?