Do you still have an older computer to connect the drive to, and does the folder appear there?
I'm wondering if you have a permissions issue. Have you tried viewing the drive using an administrative account? How about this:
Start -> All Programs -> Accessories -> Right-click on "Command Prompt" -> Run As Administrator
In the command prompt window, type "DIR X:\ /A:HS", where "X:\" is your drive letter (for example, if the drive is the "F:" drive, type: "DIR F:\ /A:HS").
Do you see the folder when you do that?