Follow these steps to log into the server.
1. Be sure "Finder" is shown on the top left of your screen, not some program. Click the desktop or Finder on the Dock to get to the Finder.
2. Click "Go" and then find "Connect to Server."
3. Put afp://10.12.5.1 into the input box and click the Connect button.
4. Log in with the same login and username that you used to log into your computer. (Tip: check the box that makes the mac remember your login and password and you won't have to do this next time!).
When you get the choice window, Select "Class Folders." You will then find Class Folders in your finder window.