Sending Mail to the IMAP Sent Folder

[Ian Barton]

I am using Dovecot and am having trouble sending copies of sent mail to 
my Sent folder. Relevant bits of my .muttrc:

imaps://i...@wilkesley.net@mail2.wilkesley.net/INBOX
set copy = yes
set record = imaps://i...@wilkesley.net@mail2.wilkesley.net/INBOX.Sent
I have also tried the following:

set record = "+Sent"
set record = "Sent"
set record = "INBOX.Sent"

So what obvious thing am I missing?

Ian.