I am trying to get screen sharing working between my sister's Macbook and my Al iMac, both running 10.5.4. When she tries to share her screen with me, hers says its waiting for me. However, on my end it appears that nothing is happening, just the screen sharing icon is greyed out in ichat. I had it working through Bonjour when both were on the same network. Her Macbook is only a couple months only (June), my iMac was UPGRADED to 10.5 from 10.4. I was doing some searching and that might have something to do with it???