I have recently set up a used leopard server on my home network. I've attempted to enable screen sharing with my snow leopard iMac. What is odd, is that the server shows up in SHARE in sidebar fine, but before I can log in as a registered user it tries to connect as guest. While doing that, the Share Screen button is in the menu bar, but clicking on it has no effect. After SL gives up trying to log in as guest I can then log in as a user but when I do the Share Screen button disappears. How can I get it to turn back on? I've got Screen Sharing set on both machines.