The problem is I cannot connect to my dad's iMac 24" from my 15" MBP. I don't understand why - I am able to connect to my little brother's MBP (pre-unibody) and my dad is able to connect to MY computer just fine. The network we have is set up like this: Initial internet line -> modem -> Time Capsule 1TB -> (wireless) -> Airport Extreme Base Station (in my room) -> Ethernet ->My MBP My dad is connected to the network wirelessly. My little brother is connected wirelessly. My AEBS is set up to increase the range of the network, and I just connect to it via Ethernet, but would go wireless if I wanted. I've tried just using the Finder option (my dad's iMac and my brother's MBP both show up, as does the Time Capsule). This is how I connect to my brother's computer. When I try with my dad's iMac I can't. It always tells me the connection has failed. Why? Any help is appreciated.