Need help with VSS 5.0 recursive diff command line

Question

VSS 5.0 is installed on my C: drive at C:\DevStudio\Vss\Win32\ss.exe My project files are located on my D: drive at D:\WebSites\MyProject

I opened a command window, changed the directory to C:\DevStudio\Vss\Win32 and ran the following command:

  ss diff -r "$/My Project/Web Site" D:\WebSites\MyProject

It just says "D:\WebSites\MyProject" not found. If I try it without the folder location, it compares the project to the files in C:\DevStudio\Vss\Win32.

Can someone help me with this? Thank you in advance.