imap-fetch-mail not working properly

[Michael Herman]

I am back to using Mutt after a bit of a hiatus (mostly because the
e-mail at work was locked down to MAPI only).  I have installed mutt
1.5.20 on my Mac from Macports. I have configured my ^ key to
imap-fetch-mail using a keybinding command in my muttrc but it doesn't
work.  The only way I can refresh my IMAP mail is to change mailboxes
and return to my inbox.  What am I doing wrong?  It's very inconvenient
to have to change mailboxes just to refresh.                                                                                              

TIA.                                                                                                  
                                                                                                      
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Michael