delprof - "The parameter is incorrect."

[audiorapture]

I am trying to use delprof for the first time, but unfortunately I get the error message "The parameter is incorrect.":

=====
C:\Users\audiorapture>\\lansweeper-vpc\premiumtools\delprof.exe /i /q /c:\\targethost
d:60
Deleting \\targethost\C$\Documents and Settings\user1... [Failed]
The parameter is incorrect.
Deleting \\targethost\C$\Documents and Settings\user2... [Failed]
The parameter is incorrect.
=====

The target is a Windows XP virtual machine on a VMware host.

Any ideas?

[Hemoco]

This might help http://support.microsoft.com/kb/315411

I think you forgot a "/" before d:60