Networking with Macs, how to see connected drives

[Gothamoddisee]

I'm attempting to connect to a networked macs internal hard drives. Usually when I click on Mac A's icon and name in any Finder window in the SHARED section, I type in my Admin name and password and a list of drives connected to MAC A comes up (also in a Finder Window) and I'm able to remotely connect to the drive like that. However, quite suddenly, I am no longer able to see the list of drives when I log in. Instead, I see Mac A's Public Folders and the 'shared folder', and thats it. YES, I'm using an Admins log and pass. YES, they are also both on the same network. YES, I'm terribly confused. Any help?
Both Macs running Mac OS 10.5.7.

[ElDiabloConCaca]

On the client computers (the computers you're connecting to), do this:

System Preferences > Sharing > File Sharing

Add the folders you want to share to the list, and they should appear the next time you connect to that computer.