I have a mixed Mac/PC environment - Macbook Pro (snow leopard); iMac 21 (leopard); 2 x Dell laptops (XP) - and an existing wifi network from a Belkin 8233-4 N modem/router. Also connected to the wifi network is a WHS for backing up the laptops; an HP printer; 2 iphones; an xbox 360; and a Wii. I've just bought a 1TB Time Capsule to use to back up the Macs as my previous external time machine hard drive just died (which was connected via USB to the iMac). At the moment, I've got the TC set up to join my existing wifi network (it's connected via an ethernet cable from the Belkin wireless router), however I'm getting issues with the wifi network not working properly and being unable to connect to the internet. Every time you wake the Mac, you have to manually reconnect to the wifi (and sometimes even re-enter the password), and things work OK until the Mac goes back to sleep. When I go into the Airport utility, the settings say that the TC is set to create a new network, so I reset it back to join an existing network via ethernet, but then if I go back to these settings a little later (after having problems with the wifi connectivity), they have reverted back to create a new network ! What am I doing wrong ? Many thanks for help and advice.