Mailboxes are not mailboxes

[Dennis Robertson]

Hello,
Before I give up and retire hurt to netscape can anyone tell me in words
of one syllable how to create mailboxes that work.  I get the message
from mutt that every one of the "mailboxes" I have designated is not a
mailbox, even though I can see that procmail has delivered to them.  I
have read the manual at 3.11 and am none the wiser.  
Thanks. 
-- 
Dennis Robertson  2/2 Sylvia Street  NOOSAVILLE  QLD  4566  AUSTRALIA
Phone: 61 7 54742343  Mobile: 0419 535539  Fax: Phone for setup.