Hi

You may have to make sure that Launch folder windows in a separate process is checked.

Optionally, you may check one of the following two commands:
Code:
runas /user:administrator "explorer.exe /e,::{7007ACC7-3202-11D1-AAD2-00805FC1270E}"
runas /user:administrator "explorer.exe /e,/root,::{7007ACC7-3202-11D1-AAD2-00805FC1270E}"
This works on different versions of XP, XP SP1 and XP SP2.
Otherwise, there may be something custom on your box
(any particular group policies etc...)?

Cheers