muttprofile - changing maildir when changing profile within mutt

[Micha Feigin <michf@post.tau.ac.il>]

I installed muttprofile to help me handle changing betwin the local
maildir and a remote imap account I have without trying to remember the
addressess each time.
As sugested I made a key binding in mutt to enable changing the profiles
and source the new values.
I can't figure out though how to make mutt change into the new mail
account.
I tried c $spoolfile or c $folder but mutt doesn't seem to do variable
extention in this way.
(Forgive me, I am new to this).

Thanx