Possible to rename a project via scmtools?

I am trying to do the equivalent of a Team->Rename in Repository via the SCM command line. I want to change the name of my eclipse project from X to Y, and "scm move X Y" gives me:
Problem running 'move':
Cannot move or rename project X

How can I do this? Renaming the local project folder manually via Windows doesn't show up as a change in "scm status", and manually updating the .project would also of course not be sufficient.

Thanks!