Why does it say "Connection Failed" when I click the server in the Sidebar?

In Mac OS X v10.5 (Leopard), Apple made some significant changes to the Mac OS Finder and the Sidebar, and these changes persist in Mac OS X v10.6 (Snow Leopard). You will not be able to access Windows servers through the sidebar, but will be able to access the volumes once you have mounted them using either the ADmitMac Browser, or by entering the path into the Server Address field in "Go - Connect to Server". We have been made to understand that it is a bug in the Finder that keeps network volumes from working properly in the Sidebar, and that Apple is working to resolve it.

In the Finder Preferences (General), make sure that "Connected Servers" is checked. Also in the Finder Preferences (Sidebar), make sure that "Computer" is selected.

Once a volume is mounted, you can access by opening from the Desktop, or by selecting "Computer" in the sidebar, then the mounted volume.