Hello Chris,
I'm sure you did, but I have to ask. Did you restart the computer afterwards?
If so, there may be a stray registry entry set wrong preventing the tutorial from otherwise normally working.
Use the
Find and Find Next option the registry to search for the
{323CA680-C24D-4099-B94D-446DD2D7249E} key.
For each one found, check the
Attributes DWORD value (if there) in it's
ShellFolder subkey (if there) to make sure it's set as
a9400100.